Anderson H Ross, Ruggles Ruth, Strachan David P, Austin Jane B, Burr Michael, Jeffs David, Standring Peter, Steriu Andrea, Goulding Rosie
Department of Community Health Sciences, St George's Hospital Medical School, London SW17 0RE.
BMJ. 2004 May 1;328(7447):1052-3. doi: 10.1136/bmj.38057.583727.47. Epub 2004 Mar 17.