Jha Prabhat, Khan Javaid, Mishra Sujata, Gupta Prakash
Centre for Global Health Research, St Michael's Hospital and Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
Aga Khan University, Karachi, Pakistan.
BMJ. 2017 Apr 11;357:j1176. doi: 10.1136/bmj.j1176.