Text and Data Mining valid from 2019-08-06
Received: 20 November 2018
Accepted: 23 July 2019
First Online: 6 August 2019
Ethics approval and consent to participate
: This manuscript has ethics committee approval from Occupational Sleep Research Center of Tehran University of Medical Sciences. The written consent form was obtained from all participants. The ethical code is IR.TUMS.VCR.REC.1396.2767.
: Not applicable.
: The authors declare that they have no competing interests.