Roberta B. Ness, Richard L. Sweet, Debra C. Bass, and Kevin E. Kip are with the University of Pittsburgh, Pittsburgh, Pa. Hugh Randall is with Emory University, Atlanta, Ga. Holley E. Richter and Richard L. Sweet are with the University of Alabama School of Medicine, Birmingham. Jeffrey F. Peipert and Andrea Montagno are with Women and Infants Hospital, Providence, RI. David E. Soper is with the Medical University of South Carolina, Charleston. Deborah B. Nelson is with the University of Pennsylvania,...