1. Division of Pharmacoepidemiology and Pharmacoeconomics; Brigham and Women's Hospital and Harvard Medical School; Boston MA USA
2. Institute of Environmental Medicine; Medical Research Center; Seoul National University; Seoul Republic of Korea
3. Department of Health Convergence; Ewha Womans University; Seoul Republic of Korea
4. Division of Rheumatology; Immunology and Allergy; Brigham and Women's Hospital; Boston MA USA
5. Department of Family Medicine; Health Promotion Center; Hallym University Sacred Heart Hospital; Anyang Republic of Korea