The literatures of non randomized study were excluded, and those of non blindedstudy were not excluded.
排除非随机研究原著性文献，未排除非盲法研究原著的文献。
2
Patients received study medication through week 30 and could continue in a blindedstudy extension through week 50.
病人接受研究药物治疗30周，并可继续留在盲法扩展研究中直至50周。
3
Methods: Single blindedstudy was conducted in 38 aged ma le with KDS, who were randomly divided into 2 groups treated with WZYZP and placebo respectively for 3 months.