1. Bandim Health Project; Bissau Guinea-Bissau
2. Research Center for Vitamins and Vaccines (CVIVA); Statens Serum Institut; Copenhagen S Denmark
3. Gastro and Food Allergy Research Group; Murdoch Children's Research Institute; Parkville Vic. Australia
4. OPEN, Institute of Clinical Research; University of Southern Denmark/Odense University Hospital; Odense C Denmark