A randomized, double-blind, controlled trial of add-on therapy in moderate-to-severe Parkinson's disease
Parkinsonism & Related Disorders (2015) - Comments
pubmed: 26342560  doi: 10.1016/j.parkreldis.2015.08.023  issn: 1873-5126  issn: 1353-8020 

Shifu Zhao, Rongchuan Cheng, Jian Zheng, Qianning Li, Jingzhou Wang, Wenhui Fan, Lili Zhang, Yanling Zhang, Hongzeng Li, Shuxiao Liu