De Assis J L, Marchiori P E, Zambon A A, Scaff M
Arq Neuropsiquiatr. 1984 Sep;42(3):221-5. doi: 10.1590/s0004-282x1984000300005.
Epidemiologic and clinic studies of both diseases and syndromes associated in a group of 304 myasthenic patients were made. A comparative projection between the present cases and those of other authors was presented.