机译:注意差距:纵向研究中来自多个来源的住院治疗
Univ N Carolina, Dept Hlth Policy & Management, 135 Dauer Dr,1104c McGavran Greenberg Hall, Chapel;
Univ N Carolina, Cecil G Sheps Ctr Hlth Serv Res, Chapel Hill, NC USA;
Optum, Eden Prairie, MN USADuke Univ, Duke Clin Res Inst, Durham, NC USA;
data linkage; data sources; hospitalizations; Medicare;