Mental health status of medical staff working in hospitals during COVID-19 pandemic in Pakistan: A cross-sectional study. Principles and Practice of Clinical Research, [S. l.], v. 8, n. 1, 2022. DOI: 10.21801/ppcrj.2022.81.1. Disponível em: https://journal.ppcr.org/index.php/ppcrjournal/article/view/167.. Acesso em: 3 may. 2024.