Natalia, D., D. K. Sari, R. Ardiansyah, and W. . Fadinie. “Knowledge Regarding Coronavirus Disease-19 Related to Nutritional Practices in Residents of Medan City, Indonesia”. Open Access Macedonian Journal of Medical Sciences, vol. 9, no. E, Aug. 2021, pp. 581-7, doi:10.3889/oamjms.2021.6264.