Text and Data Mining valid from 2019-07-30
Received: 5 April 2019
Accepted: 21 July 2019
First Online: 30 July 2019
Ethics approval and consent to participate
: A written informed consent was obtained from all the study participants, and the study was reviewed and approved by the Institutional Ethics Committee of the Chest Research Foundation.
: A consent for publication was obtained from all study participants at the time of consenting for participation in the study.
: The authors declare that they have no competing interests.