n.多通道
Methods A multicenter, double-blind, randomized controlled trial was conducted. 方法用多中心随机双盲对照试验。
Nicergoline in treatment of vascular cognitive disorder: a prospective, multicenter clinical trial. 尼麦角林治疗血管性认知功能障碍的前瞻性、多中心临床研究。
Islet cell transplantation now forms the basis of a prospective multicenter trial under the aegis of the Immune Tolerance Network. 在免疫耐受网络系统的支持下，现在已经开展胰岛移植前瞻性多中心试验研究。
Objective To solve the problem of non-inferiority test by adjusting central effect in multicenter trials. 摘要目的解决校正中心效应的非劣性检验的问题。
VIGGIANO R W,MIDTHUN D E,et al. Lung nodules enhancement at CT：multicenter study[J]. Radiology,2000,214(1)：7380. 作者：杨明，储成凤，刘斌，方丽，徐秋贞，姚青，郭庆明，滕皋军[摘要]目的：探讨非钙化型肺结核瘤的动态CT增强特点
