title: Clinical clarifications requested.
authors.forename: Walter F
authors.initials: WF
authors.lastname: Keller
mesh_terms: D003094:Collagen / Q000627:therapeutic use*; D017719:Diabetic Foot / Q000628:therapy*; D017277:Drug Approval; D004356:Drug Storage; D019317:Evidence-Based Medicine; D006801:Humans; D018579:Patient Selection; D014481:United States; D014486:United States Food and Drug Administration; D014647:Varicose Ulcer / Q000628:therapy*
chemical_list: C117898:Apligraf; D003094:Collagen