Fatigue and resilience in Master's and PhD students in the Covid-19 pandemic in Brazil: a cross-sectional study - Valóta, Izabel Alves das Chagas; Pimentel, Rafael Rodrigo da Silva; Saura, Ana Paula Neroni Stina; Silva, Rodrigo Marques da; Calache, Ana Lucia Siqueira Costa; Santos, Marcelo José dos (PLoS One, 2023)