Challenges and opportunities in developing integrated sexual and reproductive health programmes. Lancet (London, England) 2025 https://researcherprofiles.org/profile/693239484 41176395 Mayer KH, Beyrer C, Cohen MS, El-Sadr WM, Grinsztejn B, Head JM, Keuroghlian AS, Miller V, Phanuphak N, Rees H, Reid M, Starrs A, Warren M, Bekker LG