grade examination neuropathy peripheral pain clinical period screening patient initiation higher neuropathy grade peripheral patients ctcae neurotoxicity current ii arm ctcae grade nci version neuropathy ongoing infection uln peripheral toxicity neuropathy peripheral grade enrollment patient days applicable ahct ctcae initiation grade neuropathy fl pain hypertriglyceridemia edema peripheral ae hyperglycemia low grades pain neuropathy significant grade days prior enrollment randomization day neuropathy grade baseline patients ctcae significant neurosensory time diabetic enrollment