- Correspondence to: Dr A Guénégou INSERM U700 Epidemiology, Faculté de Médecine Bichat, 16 rue Henri Huchard, 75018 Paris, France;
- Received November 18, 2005
- Accepted February 14, 2006
- Revised January 16, 2006
- First published August 1, 2006.
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