- Correspondence to Dr Antonella Zanobetti, Department of Environmental Health, Exposure, Epidemiology and Risk Program, Harvard School of Public Health, 401 Park Drive, Landmark Center, Suite 404 M, P.O. Box 15698, Boston, MA 02215, USA;
- Received August 25, 2014
- Revised November 12, 2014
- Accepted November 13, 2014
- First published December 1, 2014.
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