GSTM1 and neuropathy: Longitudinal stratification of the CIPN phenotypes looking at links for neuropathy identified nominally significant protective associations with the GSTM1*null allele (p-value = 0.038, OR = 0.55) and the presence of pain at month 2 of treatment, as well as a risk factor for pain related month 2 of treatment for individuals with the GSTT1*null allele (p-value = 0.030, OR = 1.64).