The article you requested is

Panic Disorder: A Treatment Update

J Clin Psychiatry 1997;58(1):36-42

In his opening remarks, John R. Marshall, M.D., described the “evolution” that has taken place in the diagnosis of panic disorder. “While panic attacks themselves have not changed, the diagnostic criteria for panic disorder have.” As related by Dr. Marshall, the revisions in DSM-IV recognize that panic attacks can occur outside of panic disorder.