Asociación afectados Miastenia Gravis o autoinmune del Principado de Asturias in Oviedo, Spain, is a patient association for people with a rare disease and their families. It is a member of FEDER, the Spanish Federation of Rare Diseases. It works on: Miastenia Grave, Miastenia grave de inicio en el adulto, Miastenia grave juvenil, Miastenia grave neonatal transitoria.