Text and Data Mining valid from 2020-03-19
Received: 13 December 2019
Accepted: 10 March 2020
First Online: 19 March 2020
Ethics approval and consent to participate
: The study was approved by the ethics committee of Birjand University of Medical Sciences on 31 Oct. 2015 (Code: IR.BUMS.1394.51). The study protocol was explained to the guardians of the infants, who subsequently signed the written consent forms.
: The participants’ information was kept confidential. All procedures were approved by the appropriate ethics committee and have therefore been performed in accordance with the ethical standards laid down in the 1964 Declaration of Helsinki and its later amendments. Informed consent was assessed prior to intervention. Details that disclose the identity of the subjects under study were omitted.
: The authors declare that they have no competing interests.