Kiiru, R. N., C. W. Waithima, and P. K. Mwangi. “FACTORS INFLUENCING POLYDRUG USE AMONG METHADONE-ASSISTED THERAPY PATIENTS IN SELECTED CLINICS IN NAIROBI, KENYA”. Journal of Science, Innovation and Creativity, vol. 1, no. 1, Sept. 2022, pp. 10-31, doi:10.58721/jsic.v1i1.67.