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Squares stand for men and circles stand for women. The triangles mark the tested family members: black triangles—heterozygous carriers of prothrombin Belgrade mutations, white triangles—non-carriers of the prothrombin Belgrade mutation. Thrombophilia: grey—subjects suffering from thrombosis, white—healthy subjects (possibly asymptomatic carriers). B1: brother 1, B2: brother 2, D1: daughter 1, S1: sister 1, S2: sister 2.
