Trends and differences in sexual practices and sexually transmitted infections in men who have sex with men only (MSMO) and men who have sex with men and women (MSMW): a repeated c... by Eric P F Chow, Marcus Y Chen, Mario Martin-Sanchez, Jane S Hocking, Catriona Bradshaw, Christopher Fairley, Jason Ong, Richard Case

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An observational study on imported COVID-19 cases in Hong Kong during mandatory on-arrival hotel quarantine by Mario Martín-Sánchez, Peng Wu, Dillon C. Adam, Bingyi Yang, Wey Wen Lim, Yun Lin, Eric H.Y. Lau, Sheena G. Sullivan, Gabriel M. Leung, Benjamin J. Cowling

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Catalonia Suicide Risk Code Epidemiology (CSRC-Epi) study: protocol for a population-representative nested case–control study of suicide attempts in Catalonia, Spain by Lars Mehlum, Ronald C Kessler, Rosa Morros, Gemma Vilagut, Jordi Alonso, Philippe Mortier, Beatriz Puértolas Gracia, Ana De Inés Trujillo, Itxaso Alayo Bueno, Laura Ballester Coma, María Jesús Blasco Cubedo, Narcís Cardoner, Cristina Colls, Matilde Elices, Anna Garcia-Altes, Manel Gené Badia, Javier Gómez Sánchez, Mario Martín Sánchez, Bibiana Prat Pubill, Ping Qin, Diego Palao, Víctor Pérez Sola

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