Affiliation: | (1) Section of Occupational Medicine, Department of Clinical and Immunological Science, University of Siena, Via Tufi 1, 53100 Siena, Italy;(2) Department of Quantitative Methods, University of Siena, Piazza S. Francesco 8, 53100 Siena, Italy;(3) Institute of Pathological Anatomy, University of Trieste, Via della Pietà, 34129 Trieste, Italy;(4) Institute of Dermatology, University of Siena, Viale Bracci 16, 53100 Siena, Italy |