1. Formerly, member of Technical Staff, Science Center, Rockwell International, Thousand Oaks, Calif. 91360; now, medical student, Pritzker School of Medicine, The University of Chicago, Chicago, Ill. 60637, US.
2. Member of Technical Staff, Science Center, Rockwell International, Thousand Oaks, Calif. 91360, US.
3. Group leader, Science Center, Rockwell International, Thousand Oaks, Calif. 91360, US.