"¹The American Academy of Neurology (AAN), established in 1948, is an international professional association of more than 20,000 neurologists and neuroscience professionals dedicated to providing the best possible care for patients with neurological disorders."

"²The American Council for Headache Education (ACHE) is a nonprofit patient-health professional partnership dedicated to advancing the treatment and management of headache and to raising the public awareness of headache as a valid, biologically based illness."

"³The American Pain Society is a multidisciplinary community that brings together a diverse groups of scientists, clinicians and other professionals to increase the knowledge of pain and transform public policy and clinical practice to reduce pain-related suffering."

"⁴ClusterHeads, welcome to your new home on the internet! This site is devoted completely and exclusively to those that suffer from, and to the supporters of those who suffer from Cluster Headaches!"

"⁵Infotrieve, Inc. is a global provider of content management technology and information services for the life sciences and other R&D-intensive industries that pioneer important scientific, technical, and medical (STM) breakthroughs."

"⁶Migraine Awareness Group: A National Understanding for Migraineurs, was created to bring public awareness utilizing the electronic, print and artistic mediums, to the fact that Migraine is a true biologic neurological disease, to assist Migraine sufferers, their families, and coworkers, and to help improve the quality of life of Migraine sufferers worldwide."

"⁷The National Headache Foundation is a non-profit organization dedicated to educating headache sufferers and healthcare professionals about headache causes and treatments."

 

¹American Academy of Neurology. (2006). About the Academy. In AAN. Retrieved April 12, 2007, from http://www.aan.com/about/index.cfm^.
2American Council for Headache Education. (2004). Welcome. You are not alone. In ACHE . Retrieved April 12, 2007, from http://www.achenet.org/.
³American Pain Society. (2007). Home. In American Pain Society. Retrieved April 12, 2007, from http://www.ampainsoc.org/.
⁴DJ Johnson. (2006). Cluster Headaches Worldwide Support Group. In clusterheadaches. Retrieved April 12, 2007, from http://www.clusterheadaches.com/.
⁵Infotrieve. (2000). Infotrieve Online. In Healthworld Online. Retrieved April 12, 2007, from http://www4.infotrieve.com/home.asp.
⁶Magnum Inc.. (2007). Home Page. In MAGNUM. Retrieved April 12, 2007, from http://migraines.org/.
⁷National Headache Foundation. (2005). Select Home Page. In National Headache Foundation. Retrieved April 12, 2007, from http://www.headaches.org/.