International Headache Society was created in 1981.
American Headache Society was created in 1959.
The International Headache Society does not recognize a diagnosis of Acupressure Headache or Normal Headache. There are many different types of headache disorders however, and some types may be triggered by acupressure.
International Society for Pharmacoepidemiology was created in 1989.
International Horn Society was created in 1970.
International Bruckner Society was created in 1929.
International Bible Society was created in 1809.
International Continence Society was created in 1971.
International Society of Bassists was created in 1967.
International Mountain Society was created in 1980.
International Society of Cryptozoology was created in 1982.
International Pyrotechnics Society was created in 1980.
International SeaKeepers Society was created in 1998.