1. Department of Nutrition; Harvard School of Public Health; Boston MA
2. Department of Epidemiology; Harvard School of Public Health; Boston MA
3. Department of Public Health and General Practice, Faculty of Medicine; Norwegian University of Science and Technology; Trondheim Norway
4. Department of Epidemiology and Biostatistics; Imperial College London; London United Kingdom
5. Division of Biostatistics; University of Leeds; Leeds United Kingdom
6. Department of Obstetrics and Gynecology; Ewha Womans University; Seoul Republic of Korea
7. Channing Division of Network Medicine; Brigham and Women's Hospital; Boston MA