TTPA and neuropathy: McClain et al. (2016) also found no significance with polymorphisms in the CEP72 gene, while Wright et al. (2019) showed that CEP72 (rs924607), SLC547 (rs1013940) (choline transporter), and Alpha Tocopherol Transfer Protein (TTPA, binding to vitamin E) (rs1050436) were significant associated with a higher risk of developing neuropathy. No association was found by Zgheib et al. (2018) between VIPN and CEP72 (rs924607), Ewing’s tumor-associated antigen 1 (ETAA1) (rs17032980) and Melatonin Receptor 1B (MTNR1B) (rs12786200).