©BIREME/PAHO and the authors mentioned in the Table of Contents
All rights reserved. No part of this book may be reproduced, stored in a retrieval system, or transmitted, in any form or by any means, without permission in writing from the publisher.

Publisher
Latin American and Caribbean Center on Health Sciences Information
BIREME/HDP/PAHO/WHO
Rua Botucatú, 862
04023-901 - São Paulo, Brazil
http: //www.bireme.br

HDP - Division of Health and
Human Development
Juan Antonio Casas, Director

BIREME
João Yunes, Acting Director

Editors
Abel Laerte Packer, Editor
Elenice de Castro, Executive Editor

Translation and Language Revision
Micaela Leon-Bedoya

Creation and Graphical Design
Silvia de M.C. Capocci

Electronic Editing
Amélia O. Gasparini

Printed in Brazil by
BC Gráfica Editora, São Paulo

Cover: Silvia M.C.Capocci /
Julio Takayama
2 Panels 5m x 5m, plotter printed on vinyl
IV Pan American Congress on Healt
Sciences Information,
San José, Costa Rica, March 1998