Received: 14 May 2021
Accepted: 2 October 2021
First Online: 13 October 2021
: The infants’ parents or legal guardians provided written informed consent.The institutional review board/ethics committee of the Tehran University of Medical Science approved this survey (ExternalRef removed).
: Written informed consents were obtained from infants’ parents or legal guardians.
: None of the authors have any proprietary interests or conflicts of interest related to this submission.