Relation between therapy for hyperthyroidism and the course of Graves' ophthalmopathy - Bartalena, L; Marcocci, C; Bogazzi, F; Manetti, L; Tanda, M L; Dell'Unto, E; Bruno-Bossio, G; Nardi, M; Bartolomei, M P; Lepri, A; Rossi, G; Martino, E; Pinchera, A (N Eng J Med, 1998)