A linkage peak with a LOD of 2.5 was found on chromosome 5 at marker GATA141B10, for the older dataset in its most truncated form, with declining peaks as larger numbers of light drinkers were included in analyses (Figure 5). In addition, a series of peaks were found on chromosome 20, particularly for the younger dataset, as reported in Table 2. Further, minor peaks with LOD scores greater than 1.5 were also found on chromosomes 12, 18, 19 and 21.