Methylprednisolone pulse therapy for patients with moderately severe Graves’ orbitopathy: a prospective, randomized, placebo-controlled study - van Geest, R J; Sasim, I V; Koppeschaar, H P; Kalmann, R; Stravers, S N; Bijlsma, W R; Mourits, M P (Eur J Endocrinol, 2008)