2. 10 TMS sessions of 20 trains of 5s with 55s interval cross train, at a frequency of 10 Hz and 110% of motor threshold intensity of the left DLPFC. Fifty percent of patients will have a real stimulation and and the other fifty percent a sham stimulation. Subjects will be randomized to one or other of the two groups. During the first and last session a food challenge task will be administered before and after rTMS. Salivary cortisol level will be assessed throughout the protocol.