Funding for this research was provided by:
Ahvaz Jundishapur University of Medical Sciences (IR.AJUMS.REC.1396.720)
Received: 14 August 2019
Accepted: 26 March 2020
First Online: 19 May 2020
Ethics approval and consent to participate
: The protocol of this study was approved by the Ethics Committee of Ahvaz Jundishapur University of Medical Sciences (Ref No: IR.AJUMS.REC.1396.720). This study was registered in the Iranian Registry for Clinical Trials (Ref No: IRCT20160602028220N2). All participants provided written informed consent before the data collection.
: Parvin Abedi is an associate editor of BMC Pregnancy and Childbirth and other than this; the authors declare that they have no competing interests.