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Pemphigus vulgaris: environmental factors. Occupational, behavioral, medical, and qualitative food frequency questionnaireSarah Brenner; Ethel Tur; Jonathan Shapiro; Vincenzo Ruocco; Mariarosaria D'Avino; Eleonora Ruocco; Nikolai Tsankov; Snejina Vassileva; Kossara Drenovska; Petjo Brezoev; M. A. Barnadas; M. J. Gonzalez; Grant Anhalt; Hossein Nousari; Marcia Ramos- E Silva; Katia Teixeira Pinto; Maria Flora Miranda · 2001