Stranix-Chibanda L, Anderson PL, Kacanek D, Hosek S, Huang S, Nematadzira TG, Taulo F, Korutaro V, Nakabiito C, Masenya M, Lypen K, Brown E, Ibrahim ME, Yager J, Wiesner L, Johnston B, Amico KR, Rooney JF, Chakhtoura N, Spiegel HML, Chi BH. Tenofovir Diphosphate Concentrations in Dried Blood Spots From Pregnant and Postpartum Adolescent and Young Women Receiving Daily Observed Pre-exposure Prophylaxis in Sub-Saharan Africa. Clin Infect Dis. 2021 10 05; 73(7):e1893-e1900.