Scientific Reports 5: Article number: 14943; published online: 12 October 2015; updated: 07 January 2016.

In this Article, Dale P. Sandler is incorrectly affiliated with ‘Department of Global Public Health and Primary Care, University of Bergen, Bergen, Norway’. The correct affiliation is listed below:

Epidemiology Branch, NIEHS, NIH, DHHS, Research Triangle Park.