Funding for this research was provided by:
Global Alliance for Clean Cookstoves (UNF12-378)
Richard and Susan Kiphart (N/A)
Shell Exploratory Company (N/A)
Received: 5 January 2021
Accepted: 7 June 2021
First Online: 23 June 2021
: The study protocol was explained to the participants in detail and their written informed consents were obtained at the time of recruitment. The work has been carried out in accordance with the Code of Ethics of the World Medical Association (Declaration of Helsinki) and the Institutional Review Boards of the University of Chicago and the University of Ibadan approved the study protocol.
: Not applicable.
: The authors declare that they have no competing interests.