- Professor Pierluigi Cocco, Department of Public Health, Occupational Health Section, Asse Didattico - Policlinico Universitario, SS 554, Km 4,500, 09042 Monserrato (Cagliari), Italy;
- Accepted 27 July 2007
- Published in print 1 February 2008.
- Published online 23 January 2008.
- Published first 15 August 2007.
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