Affiliation: | 1. Center for Studies in Social Sciences, Calcutta, India;2. Department of Economics and Finance, University of Dayton, U.S.A.;1. WHO Collaborating Centre for Reference and Research on Salmonella, Unité des Entérobactéries, U199 INSERM, Institut Pasteur, 75724 Paris Cedex 15, France;2. |Salmonella-Zentrale, Hygienisches Institut, Hamburg Germany |