Bhat, R. A., S. A. Wani, R. Kharbanda, and S. Sethi. “An Observational Study on Pneumococcal and Influenza Vaccination Status of Patients With Type 2 Diabetes Mellitus”. International Journal of Research in Medical Sciences, vol. 6, no. 12, Nov. 2018, pp. 3842-5, doi:10.18203/2320-6012.ijrms20184880.