Informal payments for family planning: prevalence and perspectives of women, providers, and health sector key informants in western Kenya

K. Tumlinson,LE Britton,CR Williams,DM Wambua and DO Onyango. Informal payments for family planning: prevalence and perspectives of women, providers, and health sector key informants in western Kenya. Sexual and Reproductive Health Matters. 2021;29(1):10.1080/26410397.2021.1970958.