1 Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA.
2 Department of Orthodontics and Dentofacial Orthopedics, Henry M. Goldman School of Dental Medicine, Boston University, Boston, Massachusetts, USA.
3 Center for Global Health, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania, USA.
4 Department of Dermatology, Massachusetts General Hospital, Boston, Massachusetts, USA.
5 Division of Pharmacoepidemiology and Pharmacoeconomics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.
6 School of Medicine, Chung Shan Medical University, Taichung, Taiwan.
7 Division of Allergy, Immunology & Rheumatology, Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan.
8 College of Medicine, National Taiwan University, Taipei, Taiwan.