1University of Texas Medical School at Houston, Houston
2Laboratory of Clinical Investigation, National Institute of Allergy and Infectious Diseases, Bethesda, Md.
3Boston University Medical Center Hospital, Boston
4University of Alabama, Birmingham.
5Harbor-UCLA Medical Center, Torrance, Calif.
6Bowman Gray School of Medicine, Winston-Salem, N.C.
7University of Virginia, Charlottesville
8New England Deaconess Hospital, Boston
9Roerig-Pfizer, New York