- Correspondence to Andrea Farioli, UO Medicina del Lavoro—Pad 1, Sant'Orsola Malpighi University Hospital, via Palagi 9, Bologna 40138, Italy;
- Received July 28, 2015
- Revised September 28, 2015
- Accepted October 1, 2015
- First published October 15, 2015.
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