Sarin SM, Surag MK, Rijit Kannan, Mukundan PK, Ranjit Kumar KC, and Aishwarya Sureshbabu K. “Prevalence and Clinical Presentation of Post-COVID Syndrome in Patients Recovered from Acute COVID Infections in North Kerala”. Asian Journal of Medical Sciences, vol. 14, no. 5, May 2023, pp. 3-7, doi:10.3126/ajms.v14i5.51200.