Prevalence of congenital heart defects in neuroblastoma patients: a cohort study and systematic review of literature. - Engelen, Klaartje van; Merks, Johannes H. M.; Lam, Jan; Kremer, Leontien C. M.; Backes, Manouk; Baars, Marieke J. H.; Van der Pal, Heleen J. H.; Postma, Alex V.; Versteeg, Rogier; Caron, Huib N.; Mulder, Barbara J. M.; van Engelen, Klaartje (European Journal of Pediatrics, 2009)