Alice B Kornblith, Margaret Kemeny, Bercedis L Peterson, Judith Wheeler, Jeffrey Crawford, Nancy Bartlett, Gini Fleming, Stephen Graziano, Hyman Muss, Harvey Jay Cohen. Cancer 2002
Times Cited: 137
Times Cited: 137
Times Cited
Times Co-cited
Similarity
Underrepresentation of patients 65 years of age or older in cancer-treatment trials.
L F Hutchins, J M Unger, J J Crowley, C A Coltman, K S Albain. N Engl J Med 1999
L F Hutchins, J M Unger, J J Crowley, C A Coltman, K S Albain. N Engl J Med 1999
44
Barriers to clinical trial participation by older women with breast cancer.
M Margaret Kemeny, Bercedis L Peterson, Alice B Kornblith, Hyman B Muss, Judith Wheeler, Ellis Levine, Nancy Bartlett, Gini Fleming, Harvey J Cohen. J Clin Oncol 2003
M Margaret Kemeny, Bercedis L Peterson, Alice B Kornblith, Hyman B Muss, Judith Wheeler, Ellis Levine, Nancy Bartlett, Gini Fleming, Harvey J Cohen. J Clin Oncol 2003
40
Participation of patients 65 years of age or older in cancer clinical trials.
Joy H Lewis, Meredith L Kilgore, Dana P Goldman, Edward L Trimble, Richard Kaplan, Michael J Montello, Michael G Housman, José J Escarce. J Clin Oncol 2003
Joy H Lewis, Meredith L Kilgore, Dana P Goldman, Edward L Trimble, Richard Kaplan, Michael J Montello, Michael G Housman, José J Escarce. J Clin Oncol 2003
35
Systematic review of barriers to the recruitment of older patients with cancer onto clinical trials.
Carol A Townsley, Rita Selby, Lillian L Siu. J Clin Oncol 2005
Carol A Townsley, Rita Selby, Lillian L Siu. J Clin Oncol 2005
30
Enrollment of older patients in cancer treatment trials in Canada: why is age a barrier?
Karen W L Yee, Joseph L Pater, Lam Pho, Benny Zee, Lillian L Siu. J Clin Oncol 2003
Karen W L Yee, Joseph L Pater, Lam Pho, Benny Zee, Lillian L Siu. J Clin Oncol 2003
21
Prospective evaluation of cancer clinical trial accrual patterns: identifying potential barriers to enrollment.
P N Lara, R Higdon, N Lim, K Kwan, M Tanaka, D H Lau, T Wun, J Welborn, F J Meyers, S Christensen,[...]. J Clin Oncol 2001
P N Lara, R Higdon, N Lim, K Kwan, M Tanaka, D H Lau, T Wun, J Welborn, F J Meyers, S Christensen,[...]. J Clin Oncol 2001
20
Enrollment of elderly patients in clinical trials for cancer drug registration: a 7-year experience by the US Food and Drug Administration.
Lilia Talarico, Gang Chen, Richard Pazdur. J Clin Oncol 2004
Lilia Talarico, Gang Chen, Richard Pazdur. J Clin Oncol 2004
20
Predicting the risk of chemotherapy toxicity in older patients: the Chemotherapy Risk Assessment Scale for High-Age Patients (CRASH) score.
Martine Extermann, Ivette Boler, Richard R Reich, Gary H Lyman, Richard H Brown, Joseph DeFelice, Richard M Levine, Eric T Lubiner, Pablo Reyes, Frederic J Schreiber,[...]. Cancer 2012
Martine Extermann, Ivette Boler, Richard R Reich, Gary H Lyman, Richard H Brown, Joseph DeFelice, Richard M Levine, Eric T Lubiner, Pablo Reyes, Frederic J Schreiber,[...]. Cancer 2012
20
Predicting chemotherapy toxicity in older adults with cancer: a prospective multicenter study.
Arti Hurria, Kayo Togawa, Supriya G Mohile, Cynthia Owusu, Heidi D Klepin, Cary P Gross, Stuart M Lichtman, Ajeet Gajra, Smita Bhatia, Vani Katheria,[...]. J Clin Oncol 2011
Arti Hurria, Kayo Togawa, Supriya G Mohile, Cynthia Owusu, Heidi D Klepin, Cary P Gross, Stuart M Lichtman, Ajeet Gajra, Smita Bhatia, Vani Katheria,[...]. J Clin Oncol 2011
20
Adjuvant chemotherapy in older women with early-stage breast cancer.
Hyman B Muss, Donald A Berry, Constance T Cirrincione, Maria Theodoulou, Ann M Mauer, Alice B Kornblith, Ann H Partridge, Lynn G Dressler, Harvey J Cohen, Heather P Becker,[...]. N Engl J Med 2009
Hyman B Muss, Donald A Berry, Constance T Cirrincione, Maria Theodoulou, Ann M Mauer, Alice B Kornblith, Ann H Partridge, Lynn G Dressler, Harvey J Cohen, Heather P Becker,[...]. N Engl J Med 2009
18
Participation in cancer clinical trials: race-, sex-, and age-based disparities.
Vivek H Murthy, Harlan M Krumholz, Cary P Gross. JAMA 2004
Vivek H Murthy, Harlan M Krumholz, Cary P Gross. JAMA 2004
16
Role of age and health in treatment recommendations for older adults with breast cancer: the perspective of oncologists and primary care providers.
Arti Hurria, F Lennie Wong, Doojduen Villaluna, Smita Bhatia, Cathie T Chung, Joanne Mortimer, Sara Hurvitz, Arash Naeim. J Clin Oncol 2008
Arti Hurria, F Lennie Wong, Doojduen Villaluna, Smita Bhatia, Cathie T Chung, Joanne Mortimer, Sara Hurvitz, Arash Naeim. J Clin Oncol 2008
22
Improving accrual of older persons to cancer treatment trials: a randomized trial comparing an educational intervention with standard information: CALGB 360001.
Gretchen G Kimmick, Bercedis L Peterson, Alice B Kornblith, Jeanne Mandelblatt, Jeffrey L Johnson, Judith Wheeler, Robin Heinze, Harvey J Cohen, Hyman B Muss. J Clin Oncol 2005
Gretchen G Kimmick, Bercedis L Peterson, Alice B Kornblith, Jeanne Mandelblatt, Jeffrey L Johnson, Judith Wheeler, Robin Heinze, Harvey J Cohen, Hyman B Muss. J Clin Oncol 2005
16
Future of cancer incidence in the United States: burdens upon an aging, changing nation.
Benjamin D Smith, Grace L Smith, Arti Hurria, Gabriel N Hortobagyi, Thomas A Buchholz. J Clin Oncol 2009
Benjamin D Smith, Grace L Smith, Arti Hurria, Gabriel N Hortobagyi, Thomas A Buchholz. J Clin Oncol 2009
15
Adjuvant chemotherapy in older and younger women with lymph node-positive breast cancer.
Hyman B Muss, Susan Woolf, Donald Berry, Constance Cirrincione, Raymond B Weiss, Daniel Budman, William C Wood, I Craig Henderson, Clifford Hudis, Eric Winer,[...]. JAMA 2005
Hyman B Muss, Susan Woolf, Donald Berry, Constance Cirrincione, Raymond B Weiss, Daniel Budman, William C Wood, I Craig Henderson, Clifford Hudis, Eric Winer,[...]. JAMA 2005
14
Toxicity of older and younger patients treated with adjuvant chemotherapy for node-positive breast cancer: the Cancer and Leukemia Group B Experience.
Hyman B Muss, Donald A Berry, Constance Cirrincione, Daniel R Budman, I Craig Henderson, Marc L Citron, Larry Norton, Eric P Winer, Clifford A Hudis. J Clin Oncol 2007
Hyman B Muss, Donald A Berry, Constance Cirrincione, Daniel R Budman, I Craig Henderson, Marc L Citron, Larry Norton, Eric P Winer, Clifford A Hudis. J Clin Oncol 2007
14
A prospective analysis of the influence of older age on physician and patient decision-making when considering enrollment in breast cancer clinical trials (SWOG S0316).
Sara H Javid, Joseph M Unger, Julie R Gralow, Carol M Moinpour, Antoinette J Wozniak, J Wendall Goodwin, Primo N Lara, Pamela A Williams, Laura F Hutchins, Carolyn C Gotay,[...]. Oncologist 2012
Sara H Javid, Joseph M Unger, Julie R Gralow, Carol M Moinpour, Antoinette J Wozniak, J Wendall Goodwin, Primo N Lara, Pamela A Williams, Laura F Hutchins, Carolyn C Gotay,[...]. Oncologist 2012
18
Designing therapeutic clinical trials for older and frail adults with cancer: U13 conference recommendations.
Arti Hurria, William Dale, Margaret Mooney, Julia H Rowland, Karla V Ballman, Harvey J Cohen, Hyman B Muss, Richard L Schilsky, Betty Ferrell, Martine Extermann,[...]. J Clin Oncol 2014
Arti Hurria, William Dale, Margaret Mooney, Julia H Rowland, Karla V Ballman, Harvey J Cohen, Hyman B Muss, Richard L Schilsky, Betty Ferrell, Martine Extermann,[...]. J Clin Oncol 2014
13
How sociodemographics, presence of oncology specialists, and hospital cancer programs affect accrual to cancer treatment trials.
Warren B Sateren, Edward L Trimble, Jeffrey Abrams, Otis Brawley, Nancy Breen, Leslie Ford, Mary McCabe, Richard Kaplan, Malcolm Smith, Richard Ungerleider,[...]. J Clin Oncol 2002
Warren B Sateren, Edward L Trimble, Jeffrey Abrams, Otis Brawley, Nancy Breen, Leslie Ford, Mary McCabe, Richard Kaplan, Malcolm Smith, Richard Ungerleider,[...]. J Clin Oncol 2002
12
Under-representation of older adults in cancer registration trials: known problem, little progress.
Kevin S Scher, Arti Hurria. J Clin Oncol 2012
Kevin S Scher, Arti Hurria. J Clin Oncol 2012
12
Improving the Evidence Base for Treating Older Adults With Cancer: American Society of Clinical Oncology Statement.
Arti Hurria, Laura A Levit, William Dale, Supriya G Mohile, Hyman B Muss, Louis Fehrenbacher, Allison Magnuson, Stuart M Lichtman, Suanna S Bruinooge, Enrique Soto-Perez-de-Celis,[...]. J Clin Oncol 2015
Arti Hurria, Laura A Levit, William Dale, Supriya G Mohile, Hyman B Muss, Louis Fehrenbacher, Allison Magnuson, Stuart M Lichtman, Suanna S Bruinooge, Enrique Soto-Perez-de-Celis,[...]. J Clin Oncol 2015
12
Provider roles in the recruitment of underrepresented populations to cancer clinical trials.
Mollie W Howerton, M Chris Gibbons, Charles R Baffi, Tiffany L Gary, Gabriel Y Lai, Shari Bolen, Jon Tilburt, Teerath Peter Tanpitukpongse, Renee F Wilson, Neil R Powe,[...]. Cancer 2007
Mollie W Howerton, M Chris Gibbons, Charles R Baffi, Tiffany L Gary, Gabriel Y Lai, Shari Bolen, Jon Tilburt, Teerath Peter Tanpitukpongse, Renee F Wilson, Neil R Powe,[...]. Cancer 2007
11
Understanding the attitudes of the elderly towards enrolment into cancer clinical trials.
Carol A Townsley, Kelvin K Chan, Gregory R Pond, Christine Marquez, Lillian L Siu, Sharon E Straus. BMC Cancer 2006
Carol A Townsley, Kelvin K Chan, Gregory R Pond, Christine Marquez, Lillian L Siu, Sharon E Straus. BMC Cancer 2006
11
Never too old? Age should not be a barrier to enrollment in cancer clinical trials.
Matti S Aapro, Claus-Henning Köhne, Harvey Jay Cohen, Martine Extermann. Oncologist 2005
Matti S Aapro, Claus-Henning Köhne, Harvey Jay Cohen, Martine Extermann. Oncologist 2005
10
Use of comprehensive geriatric assessment in older cancer patients: recommendations from the task force on CGA of the International Society of Geriatric Oncology (SIOG).
Martine Extermann, Matti Aapro, Roberto Bernabei, Harvey Jay Cohen, Jean-Pierre Droz, Stuart Lichtman, Vincent Mor, Silvio Monfardini, Lazzaro Repetto, Liv Sørbye,[...]. Crit Rev Oncol Hematol 2005
Martine Extermann, Matti Aapro, Roberto Bernabei, Harvey Jay Cohen, Jean-Pierre Droz, Stuart Lichtman, Vincent Mor, Silvio Monfardini, Lazzaro Repetto, Liv Sørbye,[...]. Crit Rev Oncol Hematol 2005
10
Undertreatment strongly decreases prognosis of breast cancer in elderly women.
Christine Bouchardy, Elisabetta Rapiti, Gérald Fioretta, Paul Laissue, Isabelle Neyroud-Caspar, Peter Schäfer, John Kurtz, André-Pascal Sappino, Georges Vlastos. J Clin Oncol 2003
Christine Bouchardy, Elisabetta Rapiti, Gérald Fioretta, Paul Laissue, Isabelle Neyroud-Caspar, Peter Schäfer, John Kurtz, André-Pascal Sappino, Georges Vlastos. J Clin Oncol 2003
10
Barriers to enrollment of elderly adults in early-phase cancer clinical trials.
Michele Basche, Anna E Barón, S Gail Eckhardt, Lodovico Balducci, Martha Persky, Adrah Levin, Nathaniel Jackson, Chan Zeng, Pamela Vranas, John F Steiner. J Oncol Pract 2008
Michele Basche, Anna E Barón, S Gail Eckhardt, Lodovico Balducci, Martha Persky, Adrah Levin, Nathaniel Jackson, Chan Zeng, Pamela Vranas, John F Steiner. J Oncol Pract 2008
20
Broadening Eligibility Criteria to Make Clinical Trials More Representative: American Society of Clinical Oncology and Friends of Cancer Research Joint Research Statement.
Edward S Kim, Suanna S Bruinooge, Samantha Roberts, Gwynn Ison, Nancy U Lin, Lia Gore, Thomas S Uldrick, Stuart M Lichtman, Nancy Roach, Julia A Beaver,[...]. J Clin Oncol 2017
Edward S Kim, Suanna S Bruinooge, Samantha Roberts, Gwynn Ison, Nancy U Lin, Lia Gore, Thomas S Uldrick, Stuart M Lichtman, Nancy Roach, Julia A Beaver,[...]. J Clin Oncol 2017
10
Patient and physician attitudes toward breast cancer clinical trials: developing interventions based on understanding barriers.
Michelle E Melisko, Fern Hassin, Lauren Metzroth, Dan H Moore, Beth Brown, Kiran Patel, Hope S Rugo, Debu Tripathy. Clin Breast Cancer 2005
Michelle E Melisko, Fern Hassin, Lauren Metzroth, Dan H Moore, Beth Brown, Kiran Patel, Hope S Rugo, Debu Tripathy. Clin Breast Cancer 2005
21
Effect of age and comorbidity in postmenopausal breast cancer patients aged 55 years and older.
R Yancik, M N Wesley, L A Ries, R J Havlik, B K Edwards, J W Yates. JAMA 2001
R Yancik, M N Wesley, L A Ries, R J Havlik, B K Edwards, J W Yates. JAMA 2001
9
Frailty in older adults: evidence for a phenotype.
L P Fried, C M Tangen, J Walston, A B Newman, C Hirsch, J Gottdiener, T Seeman, R Tracy, W J Kop, G Burke,[...]. J Gerontol A Biol Sci Med Sci 2001
L P Fried, C M Tangen, J Walston, A B Newman, C Hirsch, J Gottdiener, T Seeman, R Tracy, W J Kop, G Burke,[...]. J Gerontol A Biol Sci Med Sci 2001
9
A pooled analysis of adjuvant chemotherapy for resected colon cancer in elderly patients.
D J Sargent, R M Goldberg, S D Jacobson, J S Macdonald, R Labianca, D G Haller, L E Shepherd, J F Seitz, G Francini. N Engl J Med 2001
D J Sargent, R M Goldberg, S D Jacobson, J S Macdonald, R Labianca, D G Haller, L E Shepherd, J F Seitz, G Francini. N Engl J Med 2001
9
Modernizing Clinical Trial Eligibility Criteria: Recommendations of the American Society of Clinical Oncology-Friends of Cancer Research Organ Dysfunction, Prior or Concurrent Malignancy, and Comorbidities Working Group.
Stuart M Lichtman, R Donald Harvey, Marie-Anne Damiette Smit, Atiqur Rahman, Michael A Thompson, Nancy Roach, Caroline Schenkel, Suanna S Bruinooge, Patricia Cortazar, Dana Walker,[...]. J Clin Oncol 2017
Stuart M Lichtman, R Donald Harvey, Marie-Anne Damiette Smit, Atiqur Rahman, Michael A Thompson, Nancy Roach, Caroline Schenkel, Suanna S Bruinooge, Patricia Cortazar, Dana Walker,[...]. J Clin Oncol 2017
10
Factors associated with breast cancer clinical trials participation and enrollment at a large academic medical center.
Michael S Simon, Wei Du, Lawrence Flaherty, Philip A Philip, Patricia Lorusso, Cheryl Miree, Daryn Smith, Diane R Brown. J Clin Oncol 2004
Michael S Simon, Wei Du, Lawrence Flaherty, Philip A Philip, Patricia Lorusso, Cheryl Miree, Daryn Smith, Diane R Brown. J Clin Oncol 2004
8
Public attitudes toward participation in cancer clinical trials.
Robert L Comis, Jon D Miller, Carolyn R Aldigé, Linda Krebs, Ellen Stoval. J Clin Oncol 2003
Robert L Comis, Jon D Miller, Carolyn R Aldigé, Linda Krebs, Ellen Stoval. J Clin Oncol 2003
8
The impact of socioeconomic status and race on trial participation for older women with breast cancer.
Cary P Gross, Giovanni Filardo, Susan T Mayne, Harlan M Krumholz. Cancer 2005
Cary P Gross, Giovanni Filardo, Susan T Mayne, Harlan M Krumholz. Cancer 2005
8
Management of cancer in the older person: a practical approach.
L Balducci, M Extermann. Oncologist 2000
L Balducci, M Extermann. Oncologist 2000
8
Randomized clinical trials in oncology: understanding and attitudes predict willingness to participate.
P M Ellis, P N Butow, M H Tattersall, S M Dunn, N Houssami. J Clin Oncol 2001
P M Ellis, P N Butow, M H Tattersall, S M Dunn, N Houssami. J Clin Oncol 2001
8
Factors that predict the referral of breast cancer patients onto clinical trials by their surgeons and medical oncologists.
L A Siminoff, A Zhang, N Colabianchi, C M Sturm, Q Shen. J Clin Oncol 2000
L A Siminoff, A Zhang, N Colabianchi, C M Sturm, Q Shen. J Clin Oncol 2000
8
Oncologists' reluctance to accrue patients onto clinical trials: an Illinois Cancer Center study.
A B Benson, J P Pregler, J A Bean, A W Rademaker, B Eshler, K Anderson. J Clin Oncol 1991
A B Benson, J P Pregler, J A Bean, A W Rademaker, B Eshler, K Anderson. J Clin Oncol 1991
8
Lumpectomy plus tamoxifen with or without irradiation in women 70 years of age or older with early breast cancer.
Kevin S Hughes, Lauren A Schnaper, Donald Berry, Constance Cirrincione, Beryl McCormick, Brenda Shank, Judith Wheeler, Lorraine A Champion, Thomas J Smith, Barbara L Smith,[...]. N Engl J Med 2004
Kevin S Hughes, Lauren A Schnaper, Donald Berry, Constance Cirrincione, Beryl McCormick, Brenda Shank, Judith Wheeler, Lorraine A Champion, Thomas J Smith, Barbara L Smith,[...]. N Engl J Med 2004
8
Implementing a geriatric assessment in cooperative group clinical cancer trials: CALGB 360401.
Arti Hurria, Constance T Cirrincione, Hyman B Muss, Alice B Kornblith, William Barry, Andrew S Artz, Linda Schmieder, Rafat Ansari, William P Tew, Douglas Weckstein,[...]. J Clin Oncol 2011
Arti Hurria, Constance T Cirrincione, Hyman B Muss, Alice B Kornblith, William Barry, Andrew S Artz, Linda Schmieder, Rafat Ansari, William P Tew, Douglas Weckstein,[...]. J Clin Oncol 2011
8
Geriatric Oncology Research in the Cooperative Groups: A Report of a SIOG Special Meeting.
Arti Hurria, Harvey J Cohen, Martine Extermann. J Geriatr Oncol 2010
Arti Hurria, Harvey J Cohen, Martine Extermann. J Geriatr Oncol 2010
18
Management of elderly patients with breast cancer: updated recommendations of the International Society of Geriatric Oncology (SIOG) and European Society of Breast Cancer Specialists (EUSOMA).
Laura Biganzoli, Hans Wildiers, Catherine Oakman, Lorenza Marotti, Sibylle Loibl, Ian Kunkler, Malcolm Reed, Stefano Ciatto, Adri C Voogd, Etienne Brain,[...]. Lancet Oncol 2012
Laura Biganzoli, Hans Wildiers, Catherine Oakman, Lorenza Marotti, Sibylle Loibl, Ian Kunkler, Malcolm Reed, Stefano Ciatto, Adri C Voogd, Etienne Brain,[...]. Lancet Oncol 2012
8
Improvement in breast cancer outcomes over time: are older women missing out?
Benjamin D Smith, Jing Jiang, Sandra S McLaughlin, Arti Hurria, Grace L Smith, Sharon H Giordano, Thomas A Buchholz. J Clin Oncol 2011
Benjamin D Smith, Jing Jiang, Sandra S McLaughlin, Arti Hurria, Grace L Smith, Sharon H Giordano, Thomas A Buchholz. J Clin Oncol 2011
8
End points and trial design in geriatric oncology research: a joint European organisation for research and treatment of cancer--Alliance for Clinical Trials in Oncology--International Society Of Geriatric Oncology position article.
Hans Wildiers, Murielle Mauer, Athanasios Pallis, Arti Hurria, Supriya G Mohile, Andrea Luciani, Giuseppe Curigliano, Martine Extermann, Stuart M Lichtman, Karla Ballman,[...]. J Clin Oncol 2013
Hans Wildiers, Murielle Mauer, Athanasios Pallis, Arti Hurria, Supriya G Mohile, Andrea Luciani, Giuseppe Curigliano, Martine Extermann, Stuart M Lichtman, Karla Ballman,[...]. J Clin Oncol 2013
8
Recruiting minority cancer patients into cancer clinical trials: a pilot project involving the Eastern Cooperative Oncology Group and the National Medical Association.
W McCaskill-Stevens, H Pinto, A C Marcus, R Comis, R Morgan, K Plomer, S Schoentgen. J Clin Oncol 1999
W McCaskill-Stevens, H Pinto, A C Marcus, R Comis, R Morgan, K Plomer, S Schoentgen. J Clin Oncol 1999
8
Comprehensive geriatric assessment adds information to Eastern Cooperative Oncology Group performance status in elderly cancer patients: an Italian Group for Geriatric Oncology Study.
Lazzaro Repetto, Lucia Fratino, Riccardo A Audisio, Antonella Venturino, Walter Gianni, Marina Vercelli, Stefano Parodi, Denise Dal Lago, Flora Gioia, Silvio Monfardini,[...]. J Clin Oncol 2002
Lazzaro Repetto, Lucia Fratino, Riccardo A Audisio, Antonella Venturino, Walter Gianni, Marina Vercelli, Stefano Parodi, Denise Dal Lago, Flora Gioia, Silvio Monfardini,[...]. J Clin Oncol 2002
7
Tumor characteristics and clinical outcome of elderly women with breast cancer.
S G Diab, R M Elledge, G M Clark. J Natl Cancer Inst 2000
S G Diab, R M Elledge, G M Clark. J Natl Cancer Inst 2000
7
Efficacy, toxicity, and quality of life in older women with early-stage breast cancer treated with letrozole or placebo after 5 years of tamoxifen: NCIC CTG intergroup trial MA.17.
Hyman B Muss, Dongsheng Tu, James N Ingle, Silvana Martino, Nicholas J Robert, Joseph L Pater, Timothy J Whelan, Michael J Palmer, Martine J Piccart, Lois E Shepherd,[...]. J Clin Oncol 2008
Hyman B Muss, Dongsheng Tu, James N Ingle, Silvana Martino, Nicholas J Robert, Joseph L Pater, Timothy J Whelan, Michael J Palmer, Martine J Piccart, Lois E Shepherd,[...]. J Clin Oncol 2008
7
Co-cited is the co-citation frequency, indicating how many articles cite the article together with the query article. Similarity is the co-citation as percentage of the times cited of the query article or the article in the search results, whichever is the lowest. These numbers are calculated for the last 100 citations when articles are cited more than 100 times.