1. Department of Food Science, Faculty of Science, University of Copenhagen, Frederiksberg, Denmark
2. Department of Pediatrics, Hvidovre Hospital, Hvidovre, Denmark
3. Department of Bacteria, Parasites and Fungi, Statens Serum Institut, Copenhagen, Copenhagen, Denmark
4. Department of Biology, University of Copenhagen, Copenhagen, Denmark
5. Department of Neonatology, Rigshospitalet,University of Copenhagen, Copenhagen, Denmark
6. Department of Science and Environment, Roskilde University, Roskilde, Denmark