- Correspondence to Professor Maria Chironna, Section of Hygiene, Department of Biomedical Science and Human Oncology, University of Bari Aldo Moro—Policlinico, Bari 70124, Italy;
- Received December 14, 2014
- Revised June 17, 2015
- Accepted July 4, 2015
- First published July 22, 2015.
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