Funding for this research was provided by:
Iran National Institute of Health Research, Tehran University of Medical Sciences (241/m/93/259.)
Received: 5 August 2019
Accepted: 3 March 2020
First Online: 17 March 2020
Ethics approval and consent to participate
: The Iran STEPS 2016 study was evaluated and approved by the ethics committee of Iran’s National Institute for Medical Research Development (NIMAD) under registration code ‘IR.NIMAD.1394.032.’ Before the interviews and measurements, all participants provided written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.