This is a systematic review that meets the criteria for inclusion on DARE.
Frost R, Macpherson H, O'Meara S. A critical scoping review of external uses of comfrey (Symphytum spp.) Complementary Therapies in Medicine 2013; 21(6): 724-745
Subject indexing assigned by NLM
Administration, Topical; Comfrey; Humans; Musculoskeletal Pain /drug therapy; Plant Extracts /administration & Randomized Controlled Trials as Topic; dosage /adverse effects
Date bibliographic record published