procedure [1–3, 5–7, 9–11, 13, 16–20]. We had one study involving linkage analysis [20], one study involving familial aggregation analysis [16], 5 involving various family-based association (i.e., TDT-type) tests [1–3, 18, 19], one involving a population-based association test [6], 2 involving epistasis or GxG interactions [9, 10], 3 involving haplotype analysis [11, 13, 17], one involving genome-wide association mapping [5], and one involving imprinting [7].
