Ming Zou et al. investigated the association of variants of SIPA1 L2, MIR4697, GCH1, VPS13C, and DDRGK1 with PD in East Asians; however, they found that rs8118008/DDRGK1 was not correlated with PD (Wang et al., 2016). The gene discussed is GCH1; the disease is Parkinson disease.