- Correspondence to Michalis Koureas, Department of Hygiene and Epidemiology,Faculty of Medicine, University of Thessaly, 22 Papakyriazi Street, Larissa 42222, Greece;
- Received March 7, 2013
- Revised September 11, 2013
- Accepted October 16, 2013
- First published November 1, 2013.
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