Reported oral and anal sex among adolescents and adults reporting heterosexual sex in sub-Saharan Africa: a systematic review.
Morhason-Bello IO, Kabakama S, Baisley K, Francis SC, Watson-Jones D.
Reprod Health 2019; 16:48.
PMID:31060573
PMCID:PMC6501425
DOI:10.1186/s12978-019-0722-9