Relapse of Graves’ disease after successful outcome of antithyroid drug therapy: results of a prospective randomized study on the use of levothyroxine - Hoermann, R; Quadbeck, B; Roggenbuck, U; Szabolcs, I; Pfeilschifter, J; Meng, W; Reschke, K; Hackenberg, K; Dettmann, J; Prehn, B; Hirche, H; Mann, K; Basedow Study G (Thyroid, 2002)