S.D, N. and H.M.J.P, V. 2022. Using Respondent-Driven Sampling to Recruit Psychoactive Drug Users: Experiences From a Pilot Study Conducted in Kandy District Sri Lanka. Asian Journal of Interdisciplinary Research. 5, 1 (Feb. 2022), 1–9. DOI:https://doi.org/10.54392/ajir2211.