1. Department of Genetics; University of Leicester; Leicester UK
2. Institute of Environmental Medicine; Unit of Work Environment Toxicology; Karolinska Institute Stockholm Sweden
3. Robert S. Boas Center for Genomics and Human Genetics; Feinstein Institute for Medical Research; New York
4. Rheumatology Unit; Department of Medicine, Karolinska University Hosiptals; Solna Karolinska Institute Stockholm Sweden