Procedure
First, an anatomical T1-weighted imaging of the brain was performed using a 3T magnetic resonance imaging (MRI) scanner (General Electric PET/MRI equipment, USA), followed by a real-time MRI-guided neuro-navigation system (Brainsight, Rogue Resolutions, Inc., Canada) using the T1-weighted image to target the left and right DLPFCs (MNI152 stereotaxic coordinates, -38, +44, +26 and +38, +44, +26, respectively) (