1. World Health Organization.Ageing and health;2018.https://www.who.int/news‐room/fact‐sheets/detail/ageing‐and‐health#. Accessed July 26 2020.
2. ce.cn.[Zhang Yi: The growth rate of the total population slows down and the level of urbanization continues to rise];2020.http://www.ce.cn/xwzx/gnsz/gdxw/202001/19/t20200119_34154542.shtml. Accessed July 26 2020.
3. World Health Organization.Noncommunicable diseases;2018.https://www.who.int/news‐room/fact‐sheets/detail/noncommunicable‐diseases. Accessed July 26 2020.
4. World Health Organization.World Health Organization‐NCD Country Profile;2018.https://www.who.int/nmh/countries/chn_zh.pdf. Accessed July 26 2020.
5. The epidemiology of polypharmacy