P19 Effects of BDNF genotypes on the antidepressant effects of repetitive transcranial magnetic stimulation for treatment-resistant depression : A randomized, double-blind, sham-controlled study. Issue 4 (April 2020) - Li, C.T.; Chu, P.J.; Hong, C.J.; Cheng, C.M.; Tsai, S.J.; Chu, R.W.