Reader reaction on the generalized Kruskal–Wallis test for genetic association studies incorporating group uncertainty

Acar and Sun (2013, Biometrics 69, 427–435) presented a generalized Kruskal–Wallis (GKW) test for genetic association studies that incorporated the genotype uncertainty and showed its robust and competitive performance compared to existing methods. We present another interesting way to derive the GKW test via a rank linear model.