【作者(必填)】Greene, Thomas J.  
【文题(必填)】Utilizing Propensity Score Methods for Ordinal Treatments and Prehospital Trauma

【年份(必填)】The University of Texas School of Public Health. ProQuest Dissertations Publishing, 2017. 10681743.

【全文链接或数据库名称(选填)】https://www.proquest.com/openvie ... holar&cbl=18750