1. Interdisciplinary Center for Graves' Orbitopathy, Admedico Augenzentrum, Fährweg 10, 4600 Olten, Switzerland
2. Department of Ophthalmology, University of Rostock, Doberaner Strasse 140, 18055 Rostock, Germany
3. Department of Strabism, Neuro-Ophthalmology and Oculoplastic Surgery, University of Goettingen, Robert-Koch-Straβe 40, 37075 Göttingen, Germany