Article History
Received: 4 July 2017
Accepted: 20 May 2018
First Online: 8 June 2018
Ethics approval and consent to participate
: Informed consent was obtained from each participant, and the study adhered to the Declaration of Helsinki. Girls less than 18 years old were also asked to deliver the informed consent form to their parents, who had to then decide if they would consent to their adolescent taking part in the study. Young Women 18 years old or older were asked to provide informed consent themselves.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.