1. International Vision Correction and Research Centre (IVCRC) & David J Apple International Laboratory of Ocular Pathology, Department of Ophthalmology, University of Heidelberg, Heidelberg, Germany.
2. International Vision Correction Research Network (IVCRC.net), Heidelberg, Germany.
3. Augenklinik Ahaus-Raesfeld-Rheine, Gerl Group, Ahaus, Germany.
4. Department of Ophthalmology, Kangbuk Samsung Hospital, Sungkyunkwan University College of Medicine, Seoul, Korea.