1. Department of Neonatology, Rigshospitalet–Copenhagen University Hospital, 2100 Copenhagen, Denmark
2. Department of Virus and Microbiological Special Diagnostics, Statens Serum Institut, 2300 Copenhagen, Denmark
3. Department of Science and Environment, Roskilde University, 4000 Roskilde, Denmark
4. Department of Plant and Environmental Sciences, University of Copenhagen, 1871 Frederiksberg C, Denmark
5. Department of Food Science, Faculty of Science, University of Copenhagen, Rolighedsvej 26, 1958 Frederiksberg C, Denmark