{HEAD ~ An action} to be taken concerning {TAIL ~ one or more patients} within the target group of patients is defined, and an execution time for the action is scheduled 
to be taken concerning
{ HEAD ~ An action } to be taken concerning { TAIL ~ one or more patients } within the target group of patients is defined , and an execution time for the action is scheduled
HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH