Affiliation: | Unitat de Microbiologia, Facultat de Medicina, Universitat Rovira i Virgili, Sant Llorenc 21, 43201 Reus, Spain;Unitat de Bioestadıćstica, Facultat de Medicina, Universitat Rovira i Virgili, 43201 Reus, Spain;Department of Preventive Medicine, State University of New York, Health Science Center at Brooklyn, NY 11203, USA |