No trials have assessed the effectiveness of bone mass screening in preventing osteoporotic fracture.

Clinical trials have assessed the effect of these antioxidant vitamins as supplements on the risk of colorectal cancer.

Example 3 A multicenter, randomized, double-blind, placebo-controlled trial to assess treatment effect of pimobendan on exercise capacity in patients with chronic heart failure [ 3 ] .

Because the extent of these biases is never clear in any particular study, one must rely on randomized controlled trials to assess the benefits of screening.

Some randomized trials (RCT) assessed the role of EPO in anemia related the cancer [ 2 3 ] .

Most Coccidioides infections resolve without specific therapy; few clinical trials have assessed outcomes in less-severe disease.

Ongoing trials are assessing the role of ovarian protection by GnRH agonists.

No clinical trials have assessed optimal timing of HAART initiation in patients with concurrent cryptococcosis.

Another trial is assessing the safety and efficacy of medication treatments for anxiety disorders in children and adolescents with co-occurring attention deficit hyperactivity disorder (ADHD).

Ongoing trials are assessing its efficacy, if any, for managing other cancers.