American Society of Clinical Hypnosis - http://asch.net/
Society for Clinical and Experimental Hypnosis -  http://sceh.us
American Academcy of Sleep Medicine - http://www.aasmnet.org
American Psychological Association - http://apa.org/
American Pain Society - http://ampainsoc.org/
International Association for the Study of Pain -http://www.iasppain.org
Sleep Education - http://sleepeducation.com/
Irritable Bowel Syndrome and Hypnosis- http://ibshypnosis.com/
Trastornos del Sueno: http://www.nlm.nih.gov/medlineplus/spanish/tutorials/sleepdisordersspanish/htm/_yes_50_no_0.htm
Sleep Consultation and Training - www.sleepsystemsinternational.com