neuropathy greater grade peripheral equal patients baseline cause ii severity existing pre neuropathy grade peripheral greater conditions higher sensory patients sensory neuropathy grade peripheral preexisting baseline greater patients evidence equal neuropathy peripheral grade patients baseline ctcae presence preexisting cause current grade sensory alopecia neuropathy persisting related toxicity constituting nci ctcae motor sensory neuropathy grade ctcae equal peripheral preexisting existing pre myopathy history chronic donor rhabdomyolysis steroid existing simvastatin patients pre