CALM2 and alcohol drinking: More specifically, 17 out of 70 genes (HIST1H4K, HIST1H4L, MAOA, GNG12, HIST1H4A, NRAS, HIST1H4B, HIST1H4H, CALM3, HIST1H4J, HIST1H4C, CALM1, CALM2, HIST1H4D, HRAS, HIST1H4E and HIST1H4F) are involved in alcoholism pathway.