AMPD1 and vein disorder: Using the criteria described above, we found “diseases of veins, lymphatic vessels, and lymph nodes (not elsewhere classified)” and “other disorders of veins” to be positively associated with the Neandertal AMPD1 haplotype (p = 4.7 × 10–7 and p = 1.5 × 10–5, respectively) and also with c.C34T (p = 3.0 × 10–3 and p = 9.2 × 10–3, respectively).