摘要
1.Background.The world’s population is aging,a process by which the age struc-ture shifts toward older ages.The number of older adults,defined as persons aged over 60,1 had exceeded one billion worldwide in 2020 and is projected to double by 2050,moving from 12% to 22% in pro-portion of the total population.2 Chronic diseases,such as stroke,car-diovascular disease,and cancer,are the most common health problems of the elderly.The incidence and mortality rates for cancer climb with advancing age.
基金
supported by the Sanming Project of Medicine in Shenzhen(grant number SZSM201911015)
the Cooperation Project in Beijing,Tianjin and Hebei of China(grant number J200017).
