Patients with severe Graves’ ophthalmopathy have a higher risk of relapsing hyperthyroidism and are unlikely to remain in remission - Eckstein, A K; Lax, H; Losch, C; Glowacka, D; Plicht, M; Mann, K; Esser, J; Morgenthaler, N G (Clin Endocrinol (Oxf), 2007)