Platelet-Rich Plasma Helps Tennis Elbow
Platelet-rich plasma -- injections of a patient's own blood platelets -- heals of tennis elbow better than cortisone shots, a study finds.

New Plavix Warning: Lack of Effect in Many People
The anti-clotting drug Plavix will get a new "black box" label warning that normal doses don't work for 2% to 14% of patients.