Navarro et al. reported that mean age at initial onset of thrombosis was higher in non-carriers of the rs867186(A4600G) allele (44 ± 14 years) than in carriers (35 ± 8years), and that the probability of not having thrombosis at age 40 years was lower in prothromb in 20210A carriers with the EPCR A4600G allele. The gene discussed is PROCR; the disease is Venous thrombosis.