HAAO and alcohol dependence: Dick et al (2010) [36] provided evidence for the involvement of 23 genes (NTSR2, TRIB2, PPM1G, MEM01, HAAO, MTIF2, CCDC139, EHBP1, BUB1, TTL, CKAP2L, MGAT5, ARHGAP15, KIAA1189, COBLLI, FAM130A2, LPR2, CHN1, PRKRA, PPP1R1C, LOC402117, IL8RA, FARP2) on chromosome 2 in alcohol dependence.