“…Many additional genes have been associated with cannabis use disorders and cannabis induced changes in executive functions. The following genes have demonstrated a positive association: DAT1 , SLC6A4 , DRD2 , DRD4 , BDNF , CHRM3 , P2RX7 , FAAH , ANKFN1 , SLC35G1 , CSMD1 , ANKK1 , COX2 , ABHD6 , ABHD12 , MAPK14 , SDK1 , ZNF704 , NCAM1 , RABEP2 , ATP2A1 , ATP2C2 , and SMG6 [ 46 , 402 , 406 , 417 , 423 , 424 , 425 , 426 , 427 , 428 , 429 , 430 , 431 , 432 , 433 , 434 , 435 ]. However, data on the effect of the polymorphisms of these genes are limited and controversial [ 419 , 429 , 436 , 437 ].…”