Figure 1From: Linkage analysis and association analysis in the presence of linkage using age at onset of COGA alcoholism dataThe multipoint linkage scans over chromosome 7 for ALDX1 and chromosome 12 for ALDX2, adjusting gender and smoking status as covariates. The dashed horizontal lines refer to the negative of the natural logarithm of 0.001 (i.e., -log(0.001)) corresponding to the significance level of 0.001.Back to article page