Sofia Pappa, Vasiliki Ntella, Timoleon Giannakas, Vassilis G Giannakoulis, Eleni Papoutsi, Paraskevi Katsaounou. Brain Behav Immun 2021
Times Cited: 492
Times Cited: 492
Times Cited
Times Co-cited
Similarity
Prevalence of depression, anxiety, and insomnia among healthcare workers during the COVID-19 pandemic: A systematic review and meta-analysis.
Sofia Pappa, Vasiliki Ntella, Timoleon Giannakas, Vassilis G Giannakoulis, Eleni Papoutsi, Paraskevi Katsaounou. Brain Behav Immun 2020
Sofia Pappa, Vasiliki Ntella, Timoleon Giannakas, Vassilis G Giannakoulis, Eleni Papoutsi, Paraskevi Katsaounou. Brain Behav Immun 2020
99
Factors Associated With Mental Health Outcomes Among Health Care Workers Exposed to Coronavirus Disease 2019.
Jianbo Lai, Simeng Ma, Ying Wang, Zhongxiang Cai, Jianbo Hu, Ning Wei, Jiang Wu, Hui Du, Tingting Chen, Ruiting Li,[...]. JAMA Netw Open 2020
Jianbo Lai, Simeng Ma, Ying Wang, Zhongxiang Cai, Jianbo Hu, Ning Wei, Jiang Wu, Hui Du, Tingting Chen, Ruiting Li,[...]. JAMA Netw Open 2020
39
A brief measure for assessing generalized anxiety disorder: the GAD-7.
Robert L Spitzer, Kurt Kroenke, Janet B W Williams, Bernd Löwe. Arch Intern Med 2006
Robert L Spitzer, Kurt Kroenke, Janet B W Williams, Bernd Löwe. Arch Intern Med 2006
13
The PHQ-9: validity of a brief depression severity measure.
K Kroenke, R L Spitzer, J B Williams. J Gen Intern Med 2001
K Kroenke, R L Spitzer, J B Williams. J Gen Intern Med 2001
13
Managing mental health challenges faced by healthcare workers during covid-19 pandemic.
Neil Greenberg, Mary Docherty, Sam Gnanapragasam, Simon Wessely. BMJ 2020
Neil Greenberg, Mary Docherty, Sam Gnanapragasam, Simon Wessely. BMJ 2020
12
A multinational, multicentre study on the psychological outcomes and associated physical symptoms amongst healthcare workers during COVID-19 outbreak.
Nicholas W S Chew, Grace K H Lee, Benjamin Y Q Tan, Mingxue Jing, Yihui Goh, Nicholas J H Ngiam, Leonard L L Yeo, Aftab Ahmad, Faheem Ahmed Khan, Ganesh Napolean Shanmugam,[...]. Brain Behav Immun 2020
Nicholas W S Chew, Grace K H Lee, Benjamin Y Q Tan, Mingxue Jing, Yihui Goh, Nicholas J H Ngiam, Leonard L L Yeo, Aftab Ahmad, Faheem Ahmed Khan, Ganesh Napolean Shanmugam,[...]. Brain Behav Immun 2020
12
Psychological status of medical workforce during the COVID-19 pandemic: A cross-sectional study.
Wen Lu, Hang Wang, Yuxing Lin, Li Li. Psychiatry Res 2020
Wen Lu, Hang Wang, Yuxing Lin, Li Li. Psychiatry Res 2020
11
The psychological and mental impact of coronavirus disease 2019 (COVID-19) on medical staff and general public - A systematic review and meta-analysis.
Min Luo, Lixia Guo, Mingzhou Yu, Wenying Jiang, Haiyan Wang. Psychiatry Res 2020
Min Luo, Lixia Guo, Mingzhou Yu, Wenying Jiang, Haiyan Wang. Psychiatry Res 2020
11
The mental health impact of the covid-19 pandemic on healthcare workers, and interventions to help them: A rapid systematic review.
Ashley Elizabeth Muller, Elisabet Vivianne Hafstad, Jan Peter William Himmels, Geir Smedslund, Signe Flottorp, Synne Øien Stensland, Stijn Stroobants, Stijn Van de Velde, Gunn Elisabeth Vist. Psychiatry Res 2020
Ashley Elizabeth Muller, Elisabet Vivianne Hafstad, Jan Peter William Himmels, Geir Smedslund, Signe Flottorp, Synne Øien Stensland, Stijn Stroobants, Stijn Van de Velde, Gunn Elisabeth Vist. Psychiatry Res 2020
11
Generalized anxiety disorder, depressive symptoms and sleep quality during COVID-19 outbreak in China: a web-based cross-sectional survey.
Yeen Huang, Ning Zhao. Psychiatry Res 2020
Yeen Huang, Ning Zhao. Psychiatry Res 2020
10
Symptoms of Posttraumatic Stress, Anxiety, Depression, Levels of Resilience and Burnout in Spanish Health Personnel during the COVID-19 Pandemic.
Lourdes Luceño-Moreno, Beatriz Talavera-Velasco, Yolanda García-Albuerne, Jesús Martín-García. Int J Environ Res Public Health 2020
Lourdes Luceño-Moreno, Beatriz Talavera-Velasco, Yolanda García-Albuerne, Jesús Martín-García. Int J Environ Res Public Health 2020
10
Mental Health Outcomes Among Frontline and Second-Line Health Care Workers During the Coronavirus Disease 2019 (COVID-19) Pandemic in Italy.
Rodolfo Rossi, Valentina Socci, Francesca Pacitti, Giorgio Di Lorenzo, Antinisca Di Marco, Alberto Siracusano, Alessandro Rossi. JAMA Netw Open 2020
Rodolfo Rossi, Valentina Socci, Francesca Pacitti, Giorgio Di Lorenzo, Antinisca Di Marco, Alberto Siracusano, Alessandro Rossi. JAMA Netw Open 2020
10
The Effects of Social Support on Sleep Quality of Medical Staff Treating Patients with Coronavirus Disease 2019 (COVID-19) in January and February 2020 in China.
Han Xiao, Yan Zhang, Desheng Kong, Shiyue Li, Ningxi Yang. Med Sci Monit 2020
Han Xiao, Yan Zhang, Desheng Kong, Shiyue Li, Ningxi Yang. Med Sci Monit 2020
9
Psychological Impact of the COVID-19 Pandemic on Health Care Workers in Singapore.
Benjamin Y Q Tan, Nicholas W S Chew, Grace K H Lee, Mingxue Jing, Yihui Goh, Leonard L L Yeo, Ka Zhang, Howe-Keat Chin, Aftab Ahmad, Faheem Ahmed Khan,[...]. Ann Intern Med 2020
Benjamin Y Q Tan, Nicholas W S Chew, Grace K H Lee, Mingxue Jing, Yihui Goh, Leonard L L Yeo, Ka Zhang, Howe-Keat Chin, Aftab Ahmad, Faheem Ahmed Khan,[...]. Ann Intern Med 2020
9
Mental health problems faced by healthcare workers due to the COVID-19 pandemic-A review.
Mamidipalli Sai Spoorthy, Sree Karthik Pratapa, Supriya Mahant. Asian J Psychiatr 2020
Mamidipalli Sai Spoorthy, Sree Karthik Pratapa, Supriya Mahant. Asian J Psychiatr 2020
9
COVID-19 anxiety among front-line nurses: Predictive role of organisational support, personal resilience and social support.
Leodoro J Labrague, Janet Alexis A De Los Santos. J Nurs Manag 2020
Leodoro J Labrague, Janet Alexis A De Los Santos. J Nurs Manag 2020
9
Burnout and somatic symptoms among frontline healthcare professionals at the peak of the Italian COVID-19 pandemic.
Serena Barello, Lorenzo Palamenghi, Guendalina Graffigna. Psychiatry Res 2020
Serena Barello, Lorenzo Palamenghi, Guendalina Graffigna. Psychiatry Res 2020
8
Impact on mental health and perceptions of psychological care among medical and nursing staff in Wuhan during the 2019 novel coronavirus disease outbreak: A cross-sectional study.
Lijun Kang, Simeng Ma, Min Chen, Jun Yang, Ying Wang, Ruiting Li, Lihua Yao, Hanping Bai, Zhongxiang Cai, Bing Xiang Yang,[...]. Brain Behav Immun 2020
Lijun Kang, Simeng Ma, Min Chen, Jun Yang, Ying Wang, Ruiting Li, Lihua Yao, Hanping Bai, Zhongxiang Cai, Bing Xiang Yang,[...]. Brain Behav Immun 2020
8
COVID-19 pandemic and mental health consequences: Systematic review of the current evidence.
Nina Vindegaard, Michael Eriksen Benros. Brain Behav Immun 2020
Nina Vindegaard, Michael Eriksen Benros. Brain Behav Immun 2020
8
Impact of viral epidemic outbreaks on mental health of healthcare workers: a rapid systematic review and meta-analysis.
Maria J Serrano-Ripoll, Jose F Meneses-Echavez, Ignacio Ricci-Cabello, David Fraile-Navarro, Maria A Fiol-deRoque, Guadalupe Pastor-Moreno, Adoración Castro, Isabel Ruiz-Pérez, Rocío Zamanillo Campos, Daniela C Gonçalves-Bradley. J Affect Disord 2020
Maria J Serrano-Ripoll, Jose F Meneses-Echavez, Ignacio Ricci-Cabello, David Fraile-Navarro, Maria A Fiol-deRoque, Guadalupe Pastor-Moreno, Adoración Castro, Isabel Ruiz-Pérez, Rocío Zamanillo Campos, Daniela C Gonçalves-Bradley. J Affect Disord 2020
8
Impact of COVID-19 pandemic on mental health in the general population: A systematic review.
Jiaqi Xiong, Orly Lipsitz, Flora Nasri, Leanna M W Lui, Hartej Gill, Lee Phan, David Chen-Li, Michelle Iacobucci, Roger Ho, Amna Majeed,[...]. J Affect Disord 2020
Jiaqi Xiong, Orly Lipsitz, Flora Nasri, Leanna M W Lui, Hartej Gill, Lee Phan, David Chen-Li, Michelle Iacobucci, Roger Ho, Amna Majeed,[...]. J Affect Disord 2020
8
Immediate Psychological Responses and Associated Factors during the Initial Stage of the 2019 Coronavirus Disease (COVID-19) Epidemic among the General Population in China.
Cuiyan Wang, Riyu Pan, Xiaoyang Wan, Yilin Tan, Linkang Xu, Cyrus S Ho, Roger C Ho. Int J Environ Res Public Health 2020
Cuiyan Wang, Riyu Pan, Xiaoyang Wan, Yilin Tan, Linkang Xu, Cyrus S Ho, Roger C Ho. Int J Environ Res Public Health 2020
8
Prevalence of mental health problems during the COVID-19 pandemic: A systematic review and meta-analysis.
Tianchen Wu, Xiaoqian Jia, Huifeng Shi, Jieqiong Niu, Xiaohan Yin, Jialei Xie, Xiaoli Wang. J Affect Disord 2021
Tianchen Wu, Xiaoqian Jia, Huifeng Shi, Jieqiong Niu, Xiaohan Yin, Jialei Xie, Xiaoli Wang. J Affect Disord 2021
8
The Fear of COVID-19 Scale: Development and Initial Validation.
Daniel Kwasi Ahorsu, Chung-Ying Lin, Vida Imani, Mohsen Saffari, Mark D Griffiths, Amir H Pakpour. Int J Ment Health Addict 2020
Daniel Kwasi Ahorsu, Chung-Ying Lin, Vida Imani, Mohsen Saffari, Mark D Griffiths, Amir H Pakpour. Int J Ment Health Addict 2020
7
Understanding and Addressing Sources of Anxiety Among Health Care Professionals During the COVID-19 Pandemic.
Tait Shanafelt, Jonathan Ripp, Mickey Trockel. JAMA 2020
Tait Shanafelt, Jonathan Ripp, Mickey Trockel. JAMA 2020
7
Prevalence of Depression, Anxiety, Distress and Insomnia and Related Factors in Healthcare Workers During COVID-19 Pandemic in Turkey.
Mustafa Kürşat Şahin, Servet Aker, Gülay Şahin, Aytül Karabekiroğlu. J Community Health 2020
Mustafa Kürşat Şahin, Servet Aker, Gülay Şahin, Aytül Karabekiroğlu. J Community Health 2020
9
Psychological distress, coping behaviors, and preferences for support among New York healthcare workers during the COVID-19 pandemic.
Ari Shechter, Franchesca Diaz, Nathalie Moise, D Edmund Anstey, Siqin Ye, Sachin Agarwal, Jeffrey L Birk, Daniel Brodie, Diane E Cannone, Bernard Chang,[...]. Gen Hosp Psychiatry 2020
Ari Shechter, Franchesca Diaz, Nathalie Moise, D Edmund Anstey, Siqin Ye, Sachin Agarwal, Jeffrey L Birk, Daniel Brodie, Diane E Cannone, Bernard Chang,[...]. Gen Hosp Psychiatry 2020
7
Stress and psychological distress among SARS survivors 1 year after the outbreak.
Antoinette M Lee, Josephine G W S Wong, Grainne M McAlonan, Vinci Cheung, Charlton Cheung, Pak C Sham, Chung-Ming Chu, Poon-Chuen Wong, Kenneth W T Tsang, Siew E Chua. Can J Psychiatry 2007
Antoinette M Lee, Josephine G W S Wong, Grainne M McAlonan, Vinci Cheung, Charlton Cheung, Pak C Sham, Chung-Ming Chu, Poon-Chuen Wong, Kenneth W T Tsang, Siew E Chua. Can J Psychiatry 2007
7
Mental health care for medical staff in China during the COVID-19 outbreak.
Qiongni Chen, Mining Liang, Yamin Li, Jincai Guo, Dongxue Fei, Ling Wang, Li He, Caihua Sheng, Yiwen Cai, Xiaojuan Li,[...]. Lancet Psychiatry 2020
Qiongni Chen, Mining Liang, Yamin Li, Jincai Guo, Dongxue Fei, Ling Wang, Li He, Caihua Sheng, Yiwen Cai, Xiaojuan Li,[...]. Lancet Psychiatry 2020
7
The Psychological Impact of Epidemic and Pandemic Outbreaks on Healthcare Workers: Rapid Review of the Evidence.
Emanuele Preti, Valentina Di Mattei, Gaia Perego, Federica Ferrari, Martina Mazzetti, Paola Taranto, Rossella Di Pierro, Fabio Madeddu, Raffaella Calati. Curr Psychiatry Rep 2020
Emanuele Preti, Valentina Di Mattei, Gaia Perego, Federica Ferrari, Martina Mazzetti, Paola Taranto, Rossella Di Pierro, Fabio Madeddu, Raffaella Calati. Curr Psychiatry Rep 2020
7
Burnout and psychological distress amongst Australian healthcare workers during the COVID-19 pandemic.
Hannah Dobson, Charles B Malpas, Aidan Jc Burrell, Caroline Gurvich, Leo Chen, Jayashri Kulkarni, Toby Winton-Brown. Australas Psychiatry 2021
Hannah Dobson, Charles B Malpas, Aidan Jc Burrell, Caroline Gurvich, Leo Chen, Jayashri Kulkarni, Toby Winton-Brown. Australas Psychiatry 2021
13
Corrigendum to Generalized anxiety disorder, depressive symptoms and sleep quality during COVID-19 outbreak in China: a web-based cross-sectional survey [Psychiatry Research, 288 (2020) 112954].
Yeen Huang, Ning Zhao. Psychiatry Res 2021
Yeen Huang, Ning Zhao. Psychiatry Res 2021
7
Prevalence of stress, anxiety, depression among the general population during the COVID-19 pandemic: a systematic review and meta-analysis.
Nader Salari, Amin Hosseinian-Far, Rostam Jalali, Aliakbar Vaisi-Raygani, Shna Rasoulpoor, Masoud Mohammadi, Shabnam Rasoulpoor, Behnam Khaledi-Paveh. Global Health 2020
Nader Salari, Amin Hosseinian-Far, Rostam Jalali, Aliakbar Vaisi-Raygani, Shna Rasoulpoor, Masoud Mohammadi, Shabnam Rasoulpoor, Behnam Khaledi-Paveh. Global Health 2020
7
Physical and mental health impacts of COVID-19 on healthcare workers: a scoping review.
Natasha Shaukat, Daniyal Mansoor Ali, Junaid Razzak. Int J Emerg Med 2020
Natasha Shaukat, Daniyal Mansoor Ali, Junaid Razzak. Int J Emerg Med 2020
7
A rapid review of the impact of COVID-19 on the mental health of healthcare workers: implications for supporting psychological well-being.
Johannes H De Kock, Helen Ann Latham, Stephen J Leslie, Mark Grindle, Sarah-Anne Munoz, Liz Ellis, Rob Polson, Christopher M O'Malley. BMC Public Health 2021
Johannes H De Kock, Helen Ann Latham, Stephen J Leslie, Mark Grindle, Sarah-Anne Munoz, Liz Ellis, Rob Polson, Christopher M O'Malley. BMC Public Health 2021
7
Timely mental health care for the 2019 novel coronavirus outbreak is urgently needed.
Yu-Tao Xiang, Yuan Yang, Wen Li, Ling Zhang, Qinge Zhang, Teris Cheung, Chee H Ng. Lancet Psychiatry 2020
Yu-Tao Xiang, Yuan Yang, Wen Li, Ling Zhang, Qinge Zhang, Teris Cheung, Chee H Ng. Lancet Psychiatry 2020
6
Risk of COVID-19 among front-line health-care workers and the general community: a prospective cohort study.
Long H Nguyen, David A Drew, Mark S Graham, Amit D Joshi, Chuan-Guo Guo, Wenjie Ma, Raaj S Mehta, Erica T Warner, Daniel R Sikavi, Chun-Han Lo,[...]. Lancet Public Health 2020
Long H Nguyen, David A Drew, Mark S Graham, Amit D Joshi, Chuan-Guo Guo, Wenjie Ma, Raaj S Mehta, Erica T Warner, Daniel R Sikavi, Chun-Han Lo,[...]. Lancet Public Health 2020
6
PTSD symptoms in healthcare workers facing the three coronavirus outbreaks: What can we expect after the COVID-19 pandemic.
Claudia Carmassi, Claudia Foghi, Valerio Dell'Oste, Annalisa Cordone, Carlo Antonio Bertelloni, Eric Bui, Liliana Dell'Osso. Psychiatry Res 2020
Claudia Carmassi, Claudia Foghi, Valerio Dell'Oste, Annalisa Cordone, Carlo Antonio Bertelloni, Eric Bui, Liliana Dell'Osso. Psychiatry Res 2020
6
Factors contributing to healthcare professional burnout during the COVID-19 pandemic: A rapid turnaround global survey.
Luca A Morgantini, Ushasi Naha, Heng Wang, Simone Francavilla, Ömer Acar, Jose M Flores, Simone Crivellaro, Daniel Moreira, Michael Abern, Martin Eklund,[...]. PLoS One 2020
Luca A Morgantini, Ushasi Naha, Heng Wang, Simone Francavilla, Ömer Acar, Jose M Flores, Simone Crivellaro, Daniel Moreira, Michael Abern, Martin Eklund,[...]. PLoS One 2020
6
Clinical features of patients infected with 2019 novel coronavirus in Wuhan, China.
Chaolin Huang, Yeming Wang, Xingwang Li, Lili Ren, Jianping Zhao, Yi Hu, Li Zhang, Guohui Fan, Jiuyang Xu, Xiaoying Gu,[...]. Lancet 2020
Chaolin Huang, Yeming Wang, Xingwang Li, Lili Ren, Jianping Zhao, Yi Hu, Li Zhang, Guohui Fan, Jiuyang Xu, Xiaoying Gu,[...]. Lancet 2020
6
Survey of Insomnia and Related Social Psychological Factors Among Medical Staff Involved in the 2019 Novel Coronavirus Disease Outbreak.
Chenxi Zhang, Lulu Yang, Shuai Liu, Simeng Ma, Ying Wang, Zhongxiang Cai, Hui Du, Ruiting Li, Lijun Kang, Meilei Su,[...]. Front Psychiatry 2020
Chenxi Zhang, Lulu Yang, Shuai Liu, Simeng Ma, Ying Wang, Zhongxiang Cai, Hui Du, Ruiting Li, Lijun Kang, Meilei Su,[...]. Front Psychiatry 2020
6
The Psychological Impact of the COVID-19 Outbreak on Health Professionals: A Cross-Sectional Study.
Emanuele Maria Giusti, Elisa Pedroli, Guido E D'Aniello, Chiara Stramba Badiale, Giada Pietrabissa, Chiara Manna, Marco Stramba Badiale, Giuseppe Riva, Gianluca Castelnuovo, Enrico Molinari. Front Psychol 2020
Emanuele Maria Giusti, Elisa Pedroli, Guido E D'Aniello, Chiara Stramba Badiale, Giada Pietrabissa, Chiara Manna, Marco Stramba Badiale, Giuseppe Riva, Gianluca Castelnuovo, Enrico Molinari. Front Psychol 2020
6
Impact of coronavirus syndromes on physical and mental health of health care workers: Systematic review and meta-analysis.
Gonzalo Salazar de Pablo, Julio Vaquerizo-Serrano, Ana Catalan, Celso Arango, Carmen Moreno, Francisco Ferre, Jae Il Shin, Sarah Sullivan, Natascia Brondino, Marco Solmi,[...]. J Affect Disord 2020
Gonzalo Salazar de Pablo, Julio Vaquerizo-Serrano, Ana Catalan, Celso Arango, Carmen Moreno, Francisco Ferre, Jae Il Shin, Sarah Sullivan, Natascia Brondino, Marco Solmi,[...]. J Affect Disord 2020
6
Mental Health and Psychosocial Problems of Medical Health Workers during the COVID-19 Epidemic in China.
Wen-Rui Zhang, Kun Wang, Lu Yin, Wen-Feng Zhao, Qing Xue, Mao Peng, Bao-Quan Min, Qing Tian, Hai-Xia Leng, Jia-Lin Du,[...]. Psychother Psychosom 2020
Wen-Rui Zhang, Kun Wang, Lu Yin, Wen-Feng Zhao, Qing Xue, Mao Peng, Bao-Quan Min, Qing Tian, Hai-Xia Leng, Jia-Lin Du,[...]. Psychother Psychosom 2020
6
Long-term psychological and occupational effects of providing hospital healthcare during SARS outbreak.
Robert G Maunder, William J Lancee, Kenneth E Balderson, Jocelyn P Bennett, Bjug Borgundvaag, Susan Evans, Christopher M B Fernandes, David S Goldbloom, Mona Gupta, Jonathan J Hunter,[...]. Emerg Infect Dis 2006
Robert G Maunder, William J Lancee, Kenneth E Balderson, Jocelyn P Bennett, Bjug Borgundvaag, Susan Evans, Christopher M B Fernandes, David S Goldbloom, Mona Gupta, Jonathan J Hunter,[...]. Emerg Infect Dis 2006
6
The Pittsburgh Sleep Quality Index: a new instrument for psychiatric practice and research.
D J Buysse, C F Reynolds, T H Monk, S R Berman, D J Kupfer. Psychiatry Res 1989
D J Buysse, C F Reynolds, T H Monk, S R Berman, D J Kupfer. Psychiatry Res 1989
6
The psychological impact of quarantine and how to reduce it: rapid review of the evidence.
Samantha K Brooks, Rebecca K Webster, Louise E Smith, Lisa Woodland, Simon Wessely, Neil Greenberg, Gideon James Rubin. Lancet 2020
Samantha K Brooks, Rebecca K Webster, Louise E Smith, Lisa Woodland, Simon Wessely, Neil Greenberg, Gideon James Rubin. Lancet 2020
6
The mental health of medical workers in Wuhan, China dealing with the 2019 novel coronavirus.
Lijun Kang, Yi Li, Shaohua Hu, Min Chen, Can Yang, Bing Xiang Yang, Ying Wang, Jianbo Hu, Jianbo Lai, Xiancang Ma,[...]. Lancet Psychiatry 2020
Lijun Kang, Yi Li, Shaohua Hu, Min Chen, Can Yang, Bing Xiang Yang, Ying Wang, Jianbo Hu, Jianbo Lai, Xiancang Ma,[...]. Lancet Psychiatry 2020
6
The psychological impact of the SARS epidemic on hospital employees in China: exposure, risk perception, and altruistic acceptance of risk.
Ping Wu, Yunyun Fang, Zhiqiang Guan, Bin Fan, Junhui Kong, Zhongling Yao, Xinhua Liu, Cordelia J Fuller, Ezra Susser, Jin Lu,[...]. Can J Psychiatry 2009
Ping Wu, Yunyun Fang, Zhiqiang Guan, Bin Fan, Junhui Kong, Zhongling Yao, Xinhua Liu, Cordelia J Fuller, Ezra Susser, Jin Lu,[...]. Can J Psychiatry 2009
6
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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.