GDNF and peripheral neuropathy: Many attempts using NSAIDs, steroids, antihistamines, tryptophan-N-formylated gramicidin (NFG), glial cell-line derived neurotrophic factor (GDNF), amifostine, gabapentin, and carbamazepine [6–8] have been conducted aiming to attenuate the drug-induced peripheral neuropathy, however, no methods have been established thus far.