- Correspondence to Dr Ana Navas-Acien, Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, 615 N Wolfe St, Office W7513D, Baltimore, MD 21205, USA;
- Received 26 August 2011
- Accepted 22 December 2011
- Published in print 1 September 2013.
- Published online 10 August 2013.
- Published first 24 January 2012.
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