Benzopyrones and the placebo "arm".
Twycross
R
R
D003374:Coumarins / Q000627:therapeutic use*; D006801:Humans; D008209:Lymphedema / Q000188:drug therapy*; D010919:Placebos; D016032:Randomized Controlled Trials as Topic; D012107:Research Design
D003374:Coumarins; D010919:Placebos