Casual sex among men who have sex with men (MSM) during the period of sheltering in place to prevent the spread of COVID-19 - Sousa, Álvaro Francisco Lopes de; Oliveira, Layze Braz de; Queiroz, Artur Acelino Francisco Luz Nunes; Carvalho, Herica Emilia Félix de; Schneider, Guilherme; Camargo, Emerson Lucas Silva; Araújo, Telma Maria Evangelista de; Brignol, Sandra; Mendes, Isabel Amélia Costa; Fronteira, Inês; McFarland, Willi (International Journal of Environmental Research and Public Health, 2021)