作者: Domenic A. Ciraulo , James A. Evans , Wei Qiao Qiu , Richard I. Shader , Carl Salzman
DOI: 10.1007/978-1-60327-435-7_3
关键词:
摘要: The aging of the world’s population has resulted in a new demographic phenomenon: significant increase percentage elderly compared with general population. Between 1960 and 1990, U.S. increased by less than 50%, while those over 65 almost 100%, 85 years age 250% (1).