A Major Double-Blind Research Study Sponsored by the National Institute

A major double-blind research study sponsored by the National Institute of Mental Health looked at the separate and combined effects of both psychological and drug treatments for patients suffering from panic disorder. Participants were randomized into five different treatment conditions, including all but which of the following?

A) psychological treatment alone (PCT)
B) combined drug and psychological treatment
C) placebo alone
D) deep brain stimulation and transcranial magnetic stimulation