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 ,P.; Auberger ,K.; Munehow ,N.; Burdach ,S.; Nowak-Gottl ,U. (Eur J Pediatr, 1999)