1 Clinical and Translational Epidemiology Unit, Massachusetts General Hospital and Harvard Medical School, Boston, MA, USA.
2 Division of Gastroenterology, Massachusetts General Hospital, Boston, MA, USA.
3 Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, USA.
4 Department of Nutrition, Harvard T.H. Chan School of Public Health, Boston, MA, USA. egiovann@hsph.harvard.edu.
5 Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA, USA. egiovann@hsph.harvard.edu.
6 Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA. egiovann@hsph.harvard.edu.