RewriteCond	%{REQUEST_URI}	!articles
RewriteCond		%{DOCUMENT_ROOT}/articles/supplements/%{REQUEST_URI} -d
RewriteRule	^(.+[^/])$ 	articles/supplements/$1/ [L]

RewriteCond	%{REQUEST_URI}	!articles
RewriteCond		%{DOCUMENT_ROOT}/articles/supplements/%{REQUEST_URI} -f
RewriteRule	^(.+[^/])$ 	articles/supplements/$1 [L]

RewriteCond	%{REQUEST_URI}	!articles
RewriteCond		%{DOCUMENT_ROOT}/articles/supplements/%{REQUEST_URI} -F
RewriteRule	^(.+)$ 	articles/supplements/$1 [L]