M. Samimi Ardestani, R. Davari Ashtiani, Z. Rezaei, S. Vasegh, and S. S Gudarzi, “Validation of Persian version of PHQ-9 for diagnosis of major depressive episode in psychiatric wards in IRAN”, Int J Appl Behav Sci, vol. 5, no. 2, pp. 1–8, Jun. 2018.