But the statistics on the long-term efficacy of diets are terrifying.

Oral treatment with erythromycin improves gastric emptying but has limited long-term efficacy.

Studies have demonstrated the long-term efficacy and the preventive effect of immunotherapy in reducing the development of new allergy.

Long-term efficacy of stimulation treatments must be further tested and evaluated.

Questions remain concerning indications, long-term efficacy, as well as allograft sizing, processing and fixation techniques.