Rajaraman Nivetha, B. . Arumugam, Annamalai Radhakrishnan, Vikram Ashokkumar, and Arunagirinathan Keerthana. “A Cross-Sectional Comparative Study of Anxiety and Depression Among Doctors Working in Covid Care Centres During the First and Second Waves of COVID-19 Pandemic in Chennai, Tamil Nadu”. Asian Journal of Medical Sciences, vol. 14, no. 2, Feb. 2023, pp. 3-8, doi:10.3126/ajms.v14i2.49260.