Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Peter Donnelly, Senior Lecturer, Centre for Applied Public Health Medicine, University of Wales College of Medicine, Cardiff.
Gareth Crompton, Professor, Centre for Applied Public Health Medicine, University of Wales College of Medicine, Cardiff.
