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Publisher's Note: Error in Funding

Posted by PLOS_ONE_Group on 14 Jun 2013 at 22:06 GMT

The second grant number provided in the funding statement is incorrect. The full, correct funding statement is as follows:

This study is not industry-sponsored and it received financial support from Italian Ministry of Health, Grant RF07-08 and RC09-10-11-12-13 (PB and GS). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.

No competing interests declared.