$PTName =~ s/,/','/g;
if ($PTName) { $Where = $Where . "AND E.PT_name IN ANY ($PTName) "; }

##</code><code>##

isc01cfa,isc02cfa
isc03ifa,isc04ifa

##</code><code>##

..........AND E.PT_name IN ANY ('isc01cfa','isc02cfa'',''isc03ifa','isc04ifa')