1 Division of Rheumatology Inflammation and Immunity, Brigham and Women's Hospital, USA; Department of Medicine, Harvard Medical School, USA; Department of Biomedical Informatics, Harvard Medical School,USA; Section of Rheumatology, VA Boston Healthcare System,USA. Electronic address: [email protected].
2 Department of Biomedical Informatics, Harvard Medical School,USA; Department of Biostatistics, Harvard T.H. Chan School of Public Health, USA.