1. From the Morehouse School of Medicine (A.B., R.D.-D., G.H.G.), Atlanta, GA; University of Mississippi Medical Center (J.L., S.K.M., E.R.F., T.E.S., H.A.T.), Jackson, MS; Jackson State University (D.F.S., H.A.T.), Jackson, MS; Emory University (V.V., P.W.W.), Atlanta, GA; and University of Alabama at Birmingham (D.K.A.), Birmingham, AL.