1 Section for Ophthalmology, Department of Clinical Neuroscience, Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
2 Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden.
3 Sachs' Children and Youth Hospital, South General Hospital, Stockholm, Sweden.
4 Science for Life Laboratory, Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden.
5 Department of Neonatology, Karolinska University Hospital, Stockholm, Sweden.
6 Department of Ophthalmology, Harvard Medical School, Boston Children's Hospital, Boston, MA, USA.