Early mitochondrial encephalomyopathy due to complex IV deficiency consistent with Alpers-Huttenlocher syndrome: report of two cases. - Castro-Gago,M.; Gonzalez-Conde,V.; Fernandez-Seara,M.J.; Rodrigo-Saez,E.; Fernandez-Cebrian,S.; Alonso-Martin,A. (Rev Neurol, 1999)