Received: 27 March 2019
Accepted: 12 August 2019
First Online: 6 September 2019
Ethics approval and consent to participate
: The Institutional Review Boards of the International Institute for Population Science and ICF International provided the ethical approval. All respondents (if 18 years or older) or their legal guardian (if younger than 18 years) provided informed consent. We obtained electronic approval to use the data from ICF International, Rockville, Maryland, USA in October 2018.
: Not applicable.
: The authors declare that they have no competing interests.