a site on chromosome 2 previously identified in a scan for nicotine dependence [Gizer et al., unpublished work], and another site identified for cannabis craving on chromosome 9 in the present study was also identified in a previous scan for alcohol dependence [Gizer et al., 2009] in the UCSF family study population. These results provide evidence suggesting that two of the regions identified in the present set of analyses may also confer risk towards nicotine and alcohol dependence in this population.
