Age Problem

• Soonchunhyang University Hospital Bucheon — Bucheon-si, South Korea
• Hallym University Medical Center- Chuncheon — Chuncheon, South Korea
• Soonchunhyang University Seoul Hospital — Seoul, South Korea
• Kangbuk Samsung Medical Center — Seoul, South Korea

• University of Colorado Anschutz Medical Center — Aurora, Colorado, United States

• CHU de Nîmes — Nîmes, Gard, France

• IRCSS Fondazione Policlinico Agostino Gemelli — Rome, Lazio, Italy

• Xuanwu Hospital, Capital Medical University — Beijing, China

• Xuanwu Hospital, Capital Medical University — Beijing, China

• Valgossens äldreboende — Stockholm, Region Stockholm, Sweden

• Thomson Wong — Hong Kong, China

Not specified

• National Yang Ming Chiao Tung University — Taipei, Taiwan