WORLD HEALTH ORGANIZATION
Regional Office for the Western Pacific
World Health Organization 2000
This document is issued by the World Health Organization - Regional Office for the Western Pacific (WHO/WPRO) for general distribution. All rights are reserved. Subject to due acknowledgement to WHO/WPRO, this document may, however, be freely reviewed, abstracted, reproduced or translated, in part or in whole, provided that such is not done for or in conjunction with commercial purposes and provided that, if it is intended to translate or reproduce the entire work, or substantial portions thereof, prior application is made to the Publications Unit, WHO/WPRO, Manila, Philippines.