[An original contribution to quality assurance. Practice testers disguised as patients].
Schmidt
Klaus
K
D005194:Family Practice / Q000592:standards*; D017144:Focus Groups; D005858:Germany; D009313:National Health Programs / Q000592:standards*; D017060:Patient Satisfaction; D016544:Patient Simulation; D011216:Practice Management, Medical / Q000592:standards*; D011785:Quality Assurance, Health Care / Q000592:standards*