title: Population ageing: a public health challenge.
mesh_terms: D000368:Aged; D005544:Forecasting; D014943:Global Health; D006801:Humans; D008875:Middle Aged; D009017:Morbidity / Q000639:trends*; D009026:Mortality / Q000639:trends*; D011157:Population Dynamics; D011634:Public Health / Q000639:trends*