“…Primary objective of the included RCTs is the evaluation of specific therapeutic approaches; seventeen of them focus on transcranial magnetic stimulation (TMS) [ 28 , 33 , 41 , 42 , 44 , 45 , 48 , 54 , 67 , 71 , 72 , 76 , 79 , 82 , 85 , 89 , 90 , 91 ], four on acupuncture as monotherapy [ 25 , 51 , 53 , 66 ], more than ten on cognitive behavioral treatment, relaxation and mindfulness [ 20 , 21 , 23 , 26 , 35 , 40 , 47 , 61 , 65 , 68 , 69 , 70 , 75 , 81 , 92 ], seven on provision of hearing aids [ 38 , 41 , 63 , 84 , 87 , 93 , 94 ], 8 on sound therapy [ 24 , 39 , 55 , 60 , 86 , 95 , 96 , 97 ], two on electrical stimulation [ 29 , …”