Received: 27 February 2019
Accepted: 2 May 2019
First Online: 7 May 2019
Ethics approval and consent to participate
: The present study was commenced after getting approval from the Institutional Ethics Committee (Approval no. 06/HG dated 02/01/2015) of Guru Nanak Dev University, Amritsar (Punjab), India, in accordance with Indian Council of Medical Research guidelines (ICMR, 2006) modified from Declaration of Helsinki (2004). Voluntary informed consent in written was attained from all the participants.
: Not applicable.
: The authors declare that they have no competing interests.