Review

Topical capsaicin (high concentration) for chronic neuropathic pain in adults.

Cochrane Db Syst Rev. 2013 Feb 28 (2): CD007393CD007393.
Randomized Controlled Trial

Relief of painful diabetic peripheral neuropathy with pregabalin: a randomized, placebo-controlled trial.

J Pain. 2005 Apr 1; 6 (4): 253260253-60.
Comparative Study

Symptom profiles differ in patients with neuropathic versus non-neuropathic pain.

J Pain. 2007 Feb 1;8(2):118-26.