nyangau, lucy obonyo, et al. “First Line Anti-Tuberculosis Drug Resistance Among Human Immunodeficiency Virus Infected Patients Attending Maryland Comprehensive Care Centre Mathare 4a Nairobi Kenya”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 15, no. 1, May 2014, pp. 661-8, https://www.gssrr.org/JournalOfBasicAndApplied/article/view/2267.