1. Department of Biosciences and Nutrition; Karolinska Institutet; Stockholm Sweden
2. Department of Ophthalmology; King's College London; St Thomas' Hospital Campus; London UK
3. Department of Immunology; Genetics and Pathology; Science for Life Laboratory Uppsala; Uppsala University; Uppsala Sweden
4. Center for Life Course Health Research; University of Oulu; Oulu Finland
5. Oulu University Hospital; Oulu Finland
6. Department of Public Health Sciences; Karolinska Institutet; Stockholm Sweden
7. Department of Medicine Solna; Karolinska Institutet; Center for Digestive Diseases; Karolinska University Hospital; Stockholm Sweden
8. Department of Twin Research & Genetic Epidemiology; King's College London; London UK
9. Department of Internal Medicine and Clinical Nutrition; Institute of Medicine; Sahlgrenska Academy; University of Gothenburg; Gothenburg Sweden
10. Department of Medical Epidemiology and Biostatistics; Karolinska Institutet; Stockholm Sweden
11. Primary Health Care Centre; Tornio Finland
12. Center for Family Medicine; Karolinska Institutet; Stockholm Sweden
13. BioCruces Health Research Institute and Ikerbasque; Basque Foundation for Science; Bilbao Spain