Copyright

Information products of the Pan American Health Organization (PAHO) and/or other information available through PAHO Internet services enjoy copyright protection unless otherwise stated. All rights are reserved.

Disclaimer

The Pan American Health Organization (PAHO) makes its information products available without warranty of any kind and accepts no responsibility for their accuracy or for any consequences of their use.

Reprints

The Pan American Health Organization welcomes written requests for permission to reproduce or translate its publications, in part or in full. Applications and inquiries should be addressed to the Publications Program, Pan American Health Organization, 525 Twenty-third Street, NW, Washington, DC, 20037, U.S.A., which will be glad to provide the latest information on any changes made to the text, plans for new editions, and reprints and translations already available.

Photocopies

In Latin America and the Caribbean, authorization to photocopy items for internal or personal use, or the internal and personal use of specific clients and for educational classroom use, should be requested in writing from the Publications Program, Pan American Health Organization, 525 Twenty-third Street, NW, Washington, DC, 20037, U.S.A. In the United States, Canada, and elsewhere in the world the same authorization is granted, provided that the appropriate fee is paid directly to Copyright Clearance Center. Prior to photocopying items, please contact the Copyright Clearance Center, Customer Service, 222 Rosewood Drive, Danvers MA 01923, USA; Telephone: (508) 750-8400.