Funding for this research was provided by:
Bill and Melinda Gates Foundation (INV-009910)
Children's Investment Fund Foundation
Received: 30 June 2020
Accepted: 9 December 2020
First Online: 6 January 2021
Ethics approval and consent to participate
: Participants voluntarily provided verbal informed consent. A waiver of written consent was granted given the sensitive nature of the topics discussed. Women aged 15–17 years provided verbal assent and verbal informed consent was also sought from her parent/guardian. The study protocol was approved by the National Health Research Ethics Committee of Nigeria (Ref: NHREC/01/01/2007–25/05/2017) and the London School of Hygiene and Tropical Medicine Ethics Committee (Ref: 14145).
: Not applicable.
: The authors declare that they have no competing interests.