1. The support of the Scottish Rite Committee for Research in Schizophrenia is gratefully acknowledged.
2. Now Chief, Division of Human Genetics, Georgia Mental Health Institute, Atlanta, Georgia.
3. This study is supported by Grant MH 19560 from the National Institute of Mental Health, U.S. Public Health Service.
4. Also collaborating in this study are: Drs. Richard Cowan, Jacques Rutschmann, and Michael Stone at Psychiatric Institute; Dr. Steven Matthyssee, Massachusetts General Hospital; Dr. Samuel E. Stern, New School for Social Research; Dr. Bernard Tursky, State University of New York at Stony Brook. (Dr. Arnold Mordkoff, New York University, was an esteemed collaborator until his death in July, 1971.) We are grateful also for the consultations and technical services of: Drs. Alan Barnett, Trevor Hadley, Charles Reiner, and Ruediger Schroeer (psychology and interviewing), Psychiatric Institute; Maurice Rosengarten and Dr. Daniel Stern, also of Psychiatric Institute; Drs. Gregory Bonomo, Laurence Carnay, Michael Painter, and David Rothner (neurological examinations and consultations), Neurological Institute; Dr. E. James Anthony and Miss Manon McGuiness, Division of Psychiatry, Washington University, St. Louis, Mo.; Dr. Irving Gottesman, University of Minnesota; Dr. Ellen Stern, Hunter College.