Some ex-gay organizations follow the tenets of a specific religion, while others try to encompass a more general spirituality. Although most ex-gay organizations were started by American evangelical Christians, there are now ex-gay organizations in other parts of the world and for Catholics, Mormons, Jews and Muslims. According to Douglas Haldeman, "This modality is thought to be one of the most common for individuals seeking to change their sexual orientation." Ex-gay ministries typically are staffed by volunteer counselors, unlike reorientation counselling, which is conducted by licensed clinicians.