Zhong, Yunqing, Zhou, Wei, Jiang, Hongli, Fan, Tao, Diao, Xiang, Yang, Hongmei, Min, Jie, Wang, Gang, Fu, Juanjuan, Mao, Bing. Elsevier; 2011. Quality of reporting of two-group parallel randomized controlled clinical trials of multi-herb formulae: a survey of reports indexed in the Science Citation Index Expanded.