Genetics Home Reference: Pelizaeus-Merzbacher disease Genetics Home Reference - Pelizaeus-Merzbacher Disease U.S. National Library of Medicine Genetics Home Reference - Pelizaeus-Merzbacher Disease Pelizaeus-Merzbacher disease Genetics Home Reference: Pelizaeus-Merzbacher disease Genetics Home Reference: Pelizaeus-Merzbacher disease Genetics Home Reference: Pelizaeus-Merzbacher disease 1/200,000 and 1/500,000