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HIROO WADA
Department of Geriatrics, Faculty of Medicine, University of Tokyo, Bunkyoku, Tokyo 113, Japan
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HIDEKI ITO
Endocrinology Section, Tokyo Metropolitan Geriatric Hospital, Itabashiku, Tokyo 173, Japan
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AKIO SATO
Department of Autonomic Nervous System, Tokyo Metropolitan Institute of Gerontology, Itabashiku, Tokyo 173, Japan