M E Farkouh

Diagnosis and treatment of chronic arterial insufficiency of the lower extremities: a critical review.

D L Sackett, D. Sackett, D. Strandness, 1996, Circulation.

A clinical trial of a chest-pain observation unit for patients with unstable angina. Chest Pain Evaluation in the Emergency Room (CHEER) Investigators.

A R Zinsmeister, S. Gabriel, A. Zinsmeister, 1998, The New England journal of medicine.

Strengths and limitations of meta-analysis: larger studies may be more reliable.

S. Yusuf, J. Pogue, M. Flather, 1997, Controlled clinical trials.