For permission to reproduce Figure 2.2, the authors thank Dr. John G. Rogers, Royal
Children's Hospital, Parkville, Australia; the American Journal of Medical Genetics; and
Wiley-Liss, a division of John Wiley and Sons, Inc. Figure copyright © 1982.

Copyright © 1994 by BasicBooks,
A Member of The Perseus Books Group

All rights reserved. Printed in the United States of America. No part of this
book may be reproduced in any manner whatsoever without written per-
mission except in the case of brief quotations embodied in critical articles
and reviews. For information, address BasicBooks, 10 East 53rd Street,
New York, NY 10022-5299.

Designed by Ellen Levine

Library of Congress Cataloging-in-Publication Data

Schizophrenia and manic-depressive disorder: the biological roots of
mental illness as revealed by the landmark study of identical twins / E.
Fuller Torrey in collaboration with Ann E. Bowler, Edward H. Taylor,
and Irving I. Gottesman.

p. cm

Includes bibliographical references and index.
ISBN 0-465-01746-0 (cloth)
ISBN 0-465-07285-2 (paper)
1. Schizophrenia. 2. Schizophrenia--Genetic aspects. 3. Manic-
depressive psychoses. 4. Manic-depressive psychoses--Genetic
aspects. 5. Diseases in twins. I. Torrey, E. Fuller ( Edwin Fuller),
1937-

RC514.S33457 1994
616.89'82--dc20 93-32458
CIP

00 01 02 03 04 05 HC 15 14 13 12 11 10 9

-iv-