Karn, S., M. Bhattarai, R. Rauniyar, A. Adhikari, P. Karna, B. P. Upadhyay, and B. P. Gupta. “Determination of CD4+ T- Lymphocytes in Healthy Children of Kathmandu”. Journal of Nepal Health Research Council, vol. 16, no. 3, Nov. 2018, pp. 325-9, https://www.nepjol.info/index.php/JNHRC/article/view/21432.