Nihmath Nisha S, Yuvaraj Maria Francis, Balaji K, Gunapriya Raghunath, and Kumaresan M, “A survey on anxiety and depression level among South Indian medical students during the COVID 19 pandemic”, Int. J. Res. Pharm. Sci., vol. 11, no. (SPL 1), pp. 779–786, Sep. 2020.