igato somitinformation ow-up o he t the study be wea Secondary Guides treatments me From Bandomlzatio and h)toth 3a ig ev oun de dgment, h an ow ha V W dy by Wala 234v 78 the pror WHAT ARE THE RESUL s)t a er the th he ce that hie k the out. et a mine yea e pro the PcactoTraquestionEore lity that 236 JAMA,14-Vol 22.No.3 2第 83 页