K. R. D, Mohandas B, Thayyil J, Nair MS, P. R, Kumar D. Incidence and probable risk factors of post COVID syndrome among COVID-19 patients in urban population of North Kerala: a 6 months cohort study. Int J Community Med Public Health [Internet]. 2023 Apr. 28 [cited 2025 Oct. 27];10(5):1882-8. Available from: https://www.ijcmph.com/index.php/ijcmph/article/view/11057