Funding for this research was provided by:
Tabriz University of Medical Sciences (IR.TBZMED.REC.1397.408)
Received: 2 January 2020
Accepted: 7 May 2020
First Online: 18 May 2020
Ethics approval and consent to participate
: This study was approved by the Ethics Committee of Tabriz University of Medical Sciences with the code of IR.TBZMED.REC.1397.408. The mothers were aware that participation in the study was voluntary, before starting the study. We obtained informed written consent from all the participants.
: Not applicable.
: The authors declare that they have no competing interests.