RT Journal Article SR Electronic T1 The Challenge Initiative: Lessons on Rapid Scale-Up of Family Planning and Adolescent and Youth Sexual and Reproductive Health Services JF Global Health: Science and Practice JO GLOB HEALTH SCI PRACT FD Johns Hopkins University- Global Health. Bloomberg School of Public Health, Center for Communication Programs SP e2400153 DO 10.9745/GHSP-D-24-00153 VO 12 IS Supplement 2 A1 Finkle, Clea A1 Bai, Yacine A1 Chandra-Mouli, Venkatraman A1 O’Keefe, Samuel A1 Tetui, Moses A1 Fischer, Suzanne A1 Lokko, Kojo A1 Mwaikambo, Lisa A1 Ohkubo, Saori YR 2024 UL http://www.ghspjournal.org/content/12/Supplement_2/e2400153.abstract AB