Sampling, standardization, randomized trial, and modeling: four techniques applied to health care marketing.
D002986:Clinical Trials as Topic; D003625:Data Collection / Q000379:methods; D006301:Health Services Needs and Demand; D006302:Health Services Research; D006761:Hospitals; D008389:Marketing of Health Services / Q000379:methods*; D008962:Models, Theoretical; D011897:Random Allocation; D012015:Reference Standards; D012494:Sampling Studies; D014481:United States