title: How perfect studies may be? Comment on Peng et al. A randomized placebo-controlled trial of intradiscal methylene blue injection for the treatment of chronic discogenic low back pain. Pain 2010;149:124-9.
authors.affiliation: Pain Management, Department for Orthopaedic Surgery, Traumatology, and Paraplegiology, University of Heidelberg, Schlierbacher Landstraße 200a, Heidelberg 69118, Germany.
authors.forename: Marcus
authors.initials: M
authors.lastname: Schiltenwolf
authors.forename: Christian
authors.initials: C
authors.lastname: Fischer
authors.forename: Pierre
authors.initials: P
authors.lastname: Kunz
mesh_terms: D002908:Chronic Disease; D004791:Enzyme Inhibitors / Q000627:therapeutic use*; D006801:Humans; D017116:Low Back Pain / Q000188:drug therapy*; D008751:Methylene Blue / Q000627:therapeutic use*; D016032:Randomized Controlled Trials as Topic / Q000379:methods*
chemical_list: D004791:Enzyme Inhibitors; D008751:Methylene Blue