Factor V G1691A and prothrombin G20210A in childhood spontaneous venous thrombosis - evidence of an age-dependent thrombotic onset in carriers of factor V G1691A and prothrombin G20210A mutation. - Schobess,R.; Junker,R.; Auberger,K.; Münchow,N.; Burdach,S.; Nowak-Göttl,U. (Eur J Pediatr, 1999)