COVID-19 pandemic is associated with increased sleep disturbances and mental health symptoms but not help-seeking: a cross-sectional nation-wide study - Moreno, Claudia Roberta de Castro; Bacelar, Andrea; Conway, Silvia G; Assis, Márcia; Genta, Pedro Rodrigues; Pachito, Daniela Vianna; Tavares, Almir; Sguillar, Danilo A; Moreira, Gustavo; Drager, Luciano Ferreira (Sleep Science (Online), 2022)