One article reported the genetic associations between a variant in TRPM8 and pain in Parkinson disease,142 and the other article reported an association between an intergenic variant rs3115229 and acute severe vaso-occlusive pain.16 In addition, articles investigating other markers than genetic markers (such as epigenetic markers) were excluded because this was not in line with our goal. Here, TRPM8 is linked to Parkinson disease.