Funding for this research was provided by:
Medanta corporate social resposibility fund
Received: 25 February 2018
Accepted: 9 January 2019
First Online: 22 January 2019
Ethics approval and consent to participate
: Ethics approval was obtained from the Institutional Review Board of Medanta the Medicity, Gurgaon and the Ethics Advisory Group of International Union Against Tuberculosis and Lung Disease, Paris, France. Informed consent, written or verbal, was waived off by The Ethics Advisory Group of The Union as secondary aggregate project data was used without any personal identifiers.
: Not applicable.
: The authors declare that they have no competing interests.
: Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.