Text and Data Mining valid from 2019-05-22
Received: 13 March 2019
Accepted: 15 May 2019
First Online: 22 May 2019
Ethics approval and consent to participate
: Informed written consent was taken from all study participants. Ethical approval for the study was obtained from Ethical Review Committee, Faculty of Medicine and University of Ruhuna.
: Not relevant.
: The authors declare that they have no competing interests.
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