1. Yale School of Medicine, New Haven, CT (M.L.P.).
2. Johns Hopkins University Hospital, Baltimore, MD (D.S.).
3. University Teaching Hospital, Lusaka, Zambia (D.S., S.Z.).
4. Kwame Nkrumah University of Science & Technology, Kumasi, Ghana (F.S.S.).
5. Tribhuvan University Teaching Hospital, Kathmandu, Nepal (G.S.S.).
6. Kaiser Permanente Bernard J Tyson School of Medicine, Pasadena, CA (A.B.).
7. Stanford University Medical Center, CA (N.V.).