title: [Who may (not) ask what?].
authors.forename: Helmut
authors.initials: H
authors.lastname: Walbert
mesh_terms: D003284:Contract Services / Q000331:legislation & jurisprudence*; D005858:Germany; D006801:Humans; D009313:National Health Programs / Q000331:legislation & jurisprudence*; D011216:Practice Management, Medical / Q000331:legislation & jurisprudence*; D012051:Reimbursement Mechanisms / Q000331:legislation & jurisprudence*