Population statistics 5 China 4 Humans 4 human 4 Female 3 Logistic Models 3 Male 3 article 3 controlled study 3 female 3 major clinical study 3 male 3 statistical model 3 Adolescent 2 Aged 2 Article 2 Climate change 2 Economics 2 Food supply 2 Learning systems 2 Middle Aged 2 adolescent 2 adult 2 aged 2 climate change 2 middle aged 2 % reductions 1 60-day mortality 1 ARIMA models 1 Above ground biomass 1