R. Mulla, V. Gopalaswamy, R. Saini, A. Vajipeyajula, S. K. Yatnatti, and V. K. Thimmarayappa, “Prevalence of stress and associated changes in the personal habits of frontline healthcare workers during COVID-19 pandemic: A questionnaire based study”, Int. J. Heal. Clin. Res., vol. 4, no. 4, pp. 169–177, Mar. 2021.