%0 Journal Article %T Psychological distress among frontline workers during the COVID-19 pandemic: A mixed-methods study %A van der Goot, Wieke E. %A Duvivier, Robbert J. %A Van Yperen, Nico W. %A de Carvalho-Filho, Marco A. %A Noot, Kirsten E. %A Ikink, Renee %A Gans, Rijk O. B. %A Kloeze, Eveline %A Tulleken, Jaap E. %A Lammers, A. J. Jolanda %A Jaarsma, A. Debbie C. %A Bierman, Wouter F. W. %J PLoS ONE %V 16 %N 8 %D 2021-08-05 %I Public Library of Science %~ DeepDyve