1. C. Pászty and N. Mohandas, Human Genome Center and Department of Subcellular Structure, Lawrence Berkeley National Laboratory, 1 Cyclotron Road (MS 74-157), University of California, Berkeley, CA 94720, USA.
2. C. M. Brion, M. E. Stevens, E. M. Rubin, Human Genome Center, Lawrence Berkeley National Laboratory, University of California, Berkeley, CA 94720, USA.
3. E. Manci, Centralized Pathology Unit for Sickle Cell Disease, University of South Alabama Doctors Hospital, Mobile, AL 36604, USA.
4. H. E. Witkowska, Children's Hospital Oakland Research Institute, Oakland, CA 94609, USA.