1 Department of Ophthalmology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark. Electronic address: carinaslidsborg@hotmail.com.
2 Department of Biostatistics, University of Copenhagen, Copenhagen, Denmark; Research Center for Vitamins and Vaccines (CVIVA), Bandim Health Project, Statens Serum Institut, Copenhagen, Denmark.
3 Department of Biostatistics, University of Copenhagen, Copenhagen, Denmark.
4 Department of Clinical Microbiology, Hvidovre Hospital, Hvidovre, Denmark.
5 Department of Ophthalmology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.
6 Department of Neonatology, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark.