1 Department of International Health, Immunology and Microbiology, University of Copenhagen, Øster Farimagsgade 5, 1353 Copenhagen K, Denmark. Electronic address: frederikke@sund.ku.dk.
2 Maternal and Child Health Unit, Department of Community Medicine, Faculty of Medicine and Allied Sciences, Rajarata University of Sri Lanka, Saliyapura, Anuradhapura, Sri Lanka.
3 Pharmacology, Toxicology, and Therapeutics, University of Edinburgh, Edinburgh, UK.
4 Department of International Health, Immunology and Microbiology, University of Copenhagen, Øster Farimagsgade 5, 1353 Copenhagen K, Denmark.