De Wereldgezondheidsorganisatie WHO schrijft: In 1990 leed de mensheid met name aan longontsteking, diarree en wiegendood; in 2020 zal dit rijtje luiden: hartinfarct, depressie, angststoornis en verkeersongevallen.
The World Health Organization (WHO) states that, whereas in 1990 the three leading causes of global disease burden were pneumonia, diarrhoeal diseases and perinatal conditions, by 2020 the leading causes will be ischaemic heart disease, depression, anxiety disorders and traffic accidents.