1Department of Medicine, School of Medicine, Stanford University, Grant Building S140, Stanford, CA 94305, USA 2Wadsworth Center, New York State Department of Health, New York, NY 12208, USA 3CNRS Institut de Génétique et Microbiologie, Université Paris Sud, Orsay, France 4 International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi 110 067, India 5Department ...