1. Ministry of Defence; Surgeon General's Department; London UK SW1A 2HA
2. Kasturba Medical College; Light House Hill Road Mangalore India 575001
3. Hospital Universitario "Celestino Hernández Robau"; Santa Clara Villa Clara Cuba
4. Immanuel Hospital Berlin and Charité Medical University Centre; Department of Integrative and Internal Medicine and Institute of Social Medicine, Epidemiology and Health Economics; Königstrasse 63 Berlin Germany 14109