Assertion: placebo's effectiveness | /r/HasProperty | established
Facets:
value: well
type: DEGREE
Source sentences:
text: (2005/2011) state that the effectiveness of ginkgo in improving walking distance for patients with intermittent claudication is marginal and not well established (level B evidence).Anderson 2013
text: The safety and effectiveness of Ventolin HFA in children aged 4 years and older have been established based upon two 12-week clinical trials in subjects aged 12 years and older with asthma and one 2-week clinical trial in subjects aged 4 to 11 years with asthma [see Adverse Reactions (6.1), Clinical Studies (