A. Mohammed, S. Abdi, S. Palani, and N. M. Joseph, “Moderate incidence of lost follow-up and risk factors among adult HIV patients on second-line ART regimens in Amhara region hospitals, Ethiopia”, J. Drug Delivery Ther., vol. 9, no. 1-s, pp. 52–59, Feb. 2019, doi: 10.22270/jddt.v9i1-s.2253.