1. 1SILK, Department of Ophthalmology, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
2. 2Finnish Register of Visual Impairment, Finnish Federation of the Visually Impaired, Helsinki, Finland
3. 3Department of Knowledge Brokers, Finnish Institute for Health and Welfare, Helsinki, Finland
4. 4Region Stockholm, Academic Primary Health Care Centre, Stockholm, Sweden
5. 5Department of Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden
6. 6Tays Eye Centre, Tampere University Hospital, Tampere, Finland