Affiliation: | Department of Internal Medicine, SANRAKU Hospital, Chiyoda-ku, Tokyo 101, Japan, JP Sumitomo Metal Industry, Chiyoda-ku, Tokyo 100, Japan, JP Graduate School of Human and Environmental Studies, Kyoto University, Kyoto 606, Japan, JP The Third Department of Internal Medicine, Tokyo Medical and Dental University, Bunkyo-ku, Tokyo 113, Japan, JP
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