Chai PR, Goodman GR, Mohamed Y, Bustamante MJ, Albrechta H, Lee JS, Glynn TR, Boland K, Hokayem J, Boyer EW, Rosen RK, Mayer KH, O'Cleirigh C. Leveraging A Digital Pill System to Understand Prevention-Effective Adherence to Oral Hiv Pre-Exposure Prophylaxis Among Men Who Have Sex with Men with Substance Use. AIDS Behav. 2024 Jul 10.