title: A retrospective case series has inherent limitations when results are compared with randomized controlled trials. Letter to the editor.
authors.forename: Karsten
authors.initials: K
authors.lastname: Knobloch
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D016032:Randomized Controlled Trials as Topic; D012189:Retrospective Studies; D012597:Sclerosing Solutions / Q000627:therapeutic use*; D012737:Sex Factors; D013708:Tendon Injuries / Q000188:drug therapy*; D013710:Tendons / Q000098:blood supply
chemical_list: D012597:Sclerosing Solutions