1 Center for Family and Community Medicine, Columbia University Irving Medical Center, New York, NY 10032, USA. Electronic address: ef2015@columbia.edu.
2 College of General Practitioners of Sri Lanka, Colombo, Sri Lanka.
3 Department of Primary Care and Mental Health, University of Liverpool, Liverpool, UK.
4 Department of Social Medicine, School of Medicine, University of Crete, Giofirakia, Greece.
5 The University of Hong Kong, Hong Kong Special Administrative Region, China.
6 University of Colorado Anschutz Medical Campus School of Medicine, Aurora, CO, USA.