1. From the Yale University (A.H.), New Haven, CT; Duke Clinical Research Institute (I.A., B.A.), Durham; Duke University (B.M.G.), Durham, NC; UT-Southwestern Medical Center (Y.X.), Dallas, TX; University of California Los Angeles (G.F.); University of Calgary (E.E.S.), Canada; University of Virginia (B.B.W.), Charlottesville, VA.