“…The most frequent etiology of PD reported was idiopathic/sporadic (n = 29 studies) 30 , 37 , 39 , 41 , 44 , 45 , 48 , 49 , 58 , 62 , 64 , 68 , 70 , 77 – 79 , 86 , 88 , 94 , 96 , 101 , 110 – 112 , 121 , 122 , 126 , 128 , 129 PD patients were commonly receiving medical and/or surgical antiparkinsonian treatment at time of inclusion (n = 35 studies) 8 , 29 , 37 , 38 , 43 , 45 , 47 , 48 , 51 , 54 , 56 , 58 , 63 , 77 – 80 , 83 , 90 , 99 , 100 , 103 – 107 , 109 , 110 , 122 – 125 , 127 , 129 , 132 . Of these, Soreq et al included patients who were on PD medications and subthalamic nucleus deep brain stimulation (STN-DBS0 56 .…”