Welcome to the official Myasthenia Gravis Association of Western PA ( MGA ) website. MGA was created in 1955 and has a long history of serving those with myasthenia gravis. The organization is located in Pittsburgh, PA on the campus of Allegheny General Hospital and provides a variety of services for those affected by MG. Myasthenia gravis ( MG ) is an autoimmune disorder that can affect a...