World Health Organization
Office of the United Nations
High Commission for Refugees
© World Health Organization, 1999
This document is not a formal publication of the World Health Organization (WHO), and all rights are reserved by the Organization. The document may, however, be freely reviewed, abstracted, quoted, reproduced or translated, in part or in whole, but not for sale or for use in conjunction with commercial purposes.
The views expressed in documents by named authors are solely the responsibility of those authors.