1. Gillings School of Global Public Health University of North Carolina at Chapel Hill Chapel Hill North Carolina USA
2. Norwegian Institute of Public Health Oslo Norway
3. Department of Statistical Science Duke University Durham North Carolina USA
4. Department of Biostatistics Harvard T.H. Chan School of Public Health Boston Massachusetts USA
5. Department of Biology University of Massachusetts at Amherst Amherst Massachusetts USA
6. Oslo University Hospital Oslo Norway
7. Institute of Clinical Medicine University of Oslo Oslo Norway
8. National Institute of Environmental Health Sciences Research Triangle Park North Carolina USA