“…A total of 14 RCTs were analysed on a total of 794 patients divided into experimental ( M age = 46.17 SD = 7.72, 42.72% female) and control ( M age = 46.81, SD = 7.17, 44.5% female) groups. Among the studies, two were conducted in Taiwan 35 , 43 , two in Netherlands 44 , 47 , three in the USA 26 , 46 , 54 , three in Germany 45 , 49 , one in the UK, one in Austria, one Iran and one in Sweden 48 , 50 , 51 , 53 . Nine studies were conducted on patients with cardiovascular disease, stress symptoms, cancer or alcohol disorder, while the remaining five studies focused on non-clinical samples 26 , 44 , 47 , 48 , 52 .…”