Affiliation: | 1. Rheumatology Unit, Fukushima Saiseikai Hospital, 2-4 Aza-Kawabata, Ohaza-Tsurusawa, Kawamata, Date-Gun, Fukushima, 960-1406, Japan 3. 1-8 Kamikoya, Nodamachi, Fukushima, Fukushima, 960-8055, Japan 2. Internal Medicine Unit, Kichijyoji Asahi Hospital, 1-30-12 Honcho, Kichijyoji, Musashino, Tokyo, 180-0004, Japan
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