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[Role of specialists in geriatric medicine--overview of world trends--].

Rapid ageing of the society inevitably increases the demand for specialists in the healthcare of older people. Under these circumstances, how geriatricians work as specialists in the framework of healthcare services is becoming an urgent concern for those who are engaged in the healthcare for the elderly. Although some similarities can be identified in the development of geriatrics medicine across the countries, actual roles of geriatricians and the definitions of their specialties seem to vary depending on the healthcare systems of each country. Current issues related to the speciality of geriatric medicine are discussed.