Personalised idiotype vaccines have shown promise, but have still to prove their efficacy in randomized clinical trials.

Road building was one way to keep the voters happy and prove the efficacy of pay-as-you-go.

They are both natural extracts, and research proves their efficacy in helping to alleviate mood disorders.

Since then studies have proven the efficacy of acupuncture for different applications, especially for treatment of chronic pain.

Focused ultrasounds have been used for a long time in the treatment of different tumors such as prostate, liver or uterus, where they proved their efficacy.