1. Assistant instructor, associate professor, research assistant, and assistant professor, respectively; Department of Pathology, The University of Texas Health Science Center, San Antonio, Tex. 78284, US.
2. Medical technologist and clinical pathologist, respectively, Audie Murphy Veterans Administration Hospital, San Antonio, Tex. 78284, US.
3. Chemist, Research Division, Hoffman-La Roche, Nutley, N.J. 07110, US.