Hair cortisol is not associated with reactogenicity after MMR-vaccination in 6-month-old infants oleh Michelle Malon, Andreas Jensen, Anne Cathrine Zimakoff, Dorthe Maria Vittrup, Ida Lind, Jesper Kiehn Sørensen, Niklas Rye Jørgensen, Lone Graff Stensballe, Jannet Svensson