Funding for this research was provided by:
Fogarty International Center (R21 ES017223)
National Institute of Environmental Health Sciences (R01 ES022163)
Received: 7 February 2020
Accepted: 28 April 2020
First Online: 13 May 2020
Ethics approval and consent to participate
: Consent of human subjects was obtained from participants and written informed consent was obtained from a parent or guardian for participants under the age of 16. Procedures were approved by the University of Iowa Institutional Review Board and the Medical Ethics Committee at Menoufia University.
: Not applicable.
: The authors declare that they have no competing interests.