help with if

i am sure this is something simple but it’s driving me nuts. The below only allows the first part of the statement through, patient service of WND but kills the next part, HBO. How can i set this so that it continues both the WND and HBO?  

#########################################################################################

# If the PV1-10 != WND or HBO then KILL the message

# else

# CONTIUNE the message

#########################################################################################

 if {![string equal $patservice WND] || [string equal $patservice HBO]} {

set dispList

 

     

   }

thanks for any help.