- Correspondence to Dr Katja Radon, Occupational and Environmental Epidemiology & Net Teaching Unit, Institute and Outpatient Clinic for Occupational, Social and Environmental Medicine, University Hospital Munich (LMU), Ziemssenstr. 1, Munich D-80336, Germany;
- Received September 10, 2013
- Revised September 25, 2013
- Accepted October 9, 2013
- First published November 8, 2013.
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