Paediatric thrombo-embolism: the influence of non-genetic factors and the role of activated protein C resistance and protein C deficiency - Uttenreuther-Fischer, MM; Vetter, B; Hellmann, C; Otting, U; Ziemer, S; Hausdorf, G; Gaedicke, G; Kulozik, AE (Eur J Pediatr, 1997)