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机构:
Vet Affairs Med Ctr, GRECC, St Louis, MO 63106 USA
St Louis Univ, Sch Med, Dept Internal Med, Div Geriatr, St Louis, MO USA
Showa Univ, Sch Dent, Dept Oral Anat, Tokyo 142, Japan
Showa Univ, Sch Med, Dept Anat 1, Tokyo 142, Japan Vet Affairs Med Ctr, GRECC, St Louis, MO 63106 USA