1. aYale School of Public Health, New Haven, United States of America.
2. bMinistry of Health, Victoria, PO Box 52, Seychelles.
3. cChronic Disease Prevention and Management, World Health Organization, Geneva, Switzerland.
4. dInstitute of Social and Preventive Medicine, Centre Hospitalier Universitaire Vaudois & University of Lausanne, Bugnon 17, Lausanne, 1005, Switzerland.