Departments of Nutrition and Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA; Department of Family Medicine, Inje University Ilsan Paik Hospital, Goyang-Si, Gyeonggi-Do 411-706, South Korea. Electronic address: yeongsook.yoon@gmail.com. Departments of Nutrition and Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA. Electronic address: nak212@mail.harvard.edu. Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA. Electronic address: poxue@channing.harvard.edu. Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA; Department of Dermatology, Warren Alpert Medical School, Brown University, Providence, RI 02903, USA; Department of Epidemiology, Brown School of Public Health, Providence, RI 02903, USA. Electronic address: hpeyc@channing.harvard.edu. Departments of Nutrition and Epidemiology, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA; Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, MA 02115, USA. Electronic address: egiovann@hsph.harvard.edu.