Psychological distress, depression, anxiety, and burnout among international humanitarian aid workers: a longitudinal study. oleh Barbara Lopes Cardozo, Carol Gotway Crawford, Cynthia Eriksson, Julia Zhu, Miriam Sabin, Alastair Ager, David Foy, Leslie Snider, Willem Scholte, Reinhard Kaiser, Miranda Olff, Bas Rijnen, Winnifred Simon