1. Kleine-Levin Syndrome -- AOL Medical Encyclopedia
The exact cause of Kleine-Levin syndrome is not known. However, researchers believe that in some cases, hereditary factors may cause some individuals to hav...
http://body.aol.com/conditions/kleine-levin-syndrome

2. Kleine-Levin syndrome -- MedicineNet
Kleine-Levin syndrome definition - Medical Dictionary definitions of popular medical terms. medical dictionary A-Z List > Kleine-Levin syndrome. Online Medical Dictionary and glossary with medical definitions.
http://www.medterms.com/script/main/art.asp?articlekey=11542

3. Kleine Levin Syndrome -- Information from Healthwise
It is thought that symptoms of Kleine-Levin syndrome may be related to malfunction of the portion of the brain that helps to regulate functions such as sleep, appetite, and body temperature (hypothalamus).
http://www.everettclinic.com/kbase/nord/nord1068.htm