Ayub, Y., Anjum, R., Margrat, S., Ashraf, A., & Qayyum, S. (2019). Prevalence of depression, anxiety and stress among healthcare professionals at tertiary care hospitals, Karachi – Pakistan. Annals of Psychophysiology, 6, 23-29. https://doi.org/10.29052/2412-3188.v6.i1.2019.23-29