title: Dr. Yoshida, et al reply.
authors.affiliation: Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA; kazukiyoshida@mail.harvard.edu.
authors.forename: Kazuki
authors.initials: K
authors.lastname: Yoshida
authors.affiliation: Immuno-Rheumatology Center, St. Luke's International Hospital, Chuo-ku, Tokyo, Japan;
authors.forename: Mitsumasa
authors.initials: M
authors.lastname: Kishimoto
authors.affiliation: Division of Rheumatology, Immunology and Allergy, Brigham and Women's Hospital, Boston, Massachusetts, USA.
authors.forename: Daniel H
authors.initials: DH
authors.lastname: Solomon