What are the causes, symptoms, results, and possible cures for anorexia nervosa

I am working on a project for my school and I need some help. The project is based on diseases that affect our society and my group picked Anorexia Nervosa. I would really appreciate it if you could provide all the information you know about Anorexia. Thank you.

See the following websites:

http://en.wikipedia.org/wiki/anorexia_ne...

http://familydoctor.org/online/famdocen/...

http://www.nlm.nih.gov/medlineplus/ency/...