Hancock et al. studied associations of 27 NOS1 SNVs (see Section 2.1.4 on “Parkinson’s Disease” regardingNOS1), 18 NOS2 SNVs (rs3730014, rs3794766, rs2072324, rs8072199, rs16966563, rs3794764, rs17722851, rs944725, rs4795067, rs1137933, rs12944039, rs2314810, rs2248814, rs2297518, rs2297516, rs2297515, rs1060826, and rs2255929) and 5 NOS3SNVs (see Section 2.4.4 on “Parkinson’s Disease” regardingNOS3) with a risk for PD in 337 families with sporadic PD from the USA and 358 families with familial PD. The gene discussed is NOS2; the disease is Parkinson disease.