Pediatric Invasive Pneumococcal Disease Caused by Vaccine Serotypes following the Introduction of Conjugate Vaccination in Denmark. - Harboe, Zitta B.; Valentiner-Branth, Palle; Ingels, Helene; Rasmussen, Jeppe N.; Andersen, Peter H. S.; Bjerre, Catherine C.; Goldblatt, David; Ashton, Lindsey; Haston, Mitch; Konradsen, Helle B.; Lambertsen, Lotte (PLoS ONE, 2013)