1. Source: WHO, http://www.who.int/healthinfo/global_burden_disease/en/.
2. Source: WHO, projections of mortality and burden of disease, 2004–2030: http://www.who.int/healthinfo/global_burden_disease/projections2004/en/.
3. Prospects for neurology and psychiatry;Cowan;J. Am. Med. Assoc.,2001
4. A network dysfunction perspective on neurodegenerative diseases;Palop;Nature,2006
5. Source: http://www.drugs.com/stats/top100/2013/sales.