Affiliation: | 1. Paediatric Service, Department of Ophthalmology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland;2. Ophthalmic Pathology Service, Department of Ophthalmology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland;3. Department of Anterior Segment and Corneal Surgery Service, Department of Ophthalmology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland |