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Alternate terms for Vodou include Vodun, Vodoun, Voudou, Vudu, Voodoo and even Voo-Doo. The latter spellings have been discouraged by some as indicating a sensationalized form of the religion. Vodou is also known as "Sevis Lwa" or Service to the Lwa, and those who practice Vodou are called Vodouisants. A person does not need to be initiated into Vodou to be a Vodouisant and serve his or her head Lwa or ancestors, but advanced workings in Vodou always require initiation