ELECTRONIC	h   t   t   p   c o l o n   s l a s h   s l a s h   w   w   w dot w h o dot i n t   s l a s h   c   h   p   s l a s h   e n   s l a s h   i n d e x dot h t m l w o r l d	http://www.who.int/chp/en/index.htmlworld	1