Parashar, R., D. Kaushik, and P. K. Malik. “The Study of Clinical and Endoscopic Spectrum of Upper Gastrointestinal Manifestations in HIV Patients”. International Journal of Research in Medical Sciences, vol. 6, no. 5, Apr. 2018, pp. 1588-93, doi:10.18203/2320-6012.ijrms20181429.