“…The total sample size comprised 1464 subjects. The selected studies were conducted in different countries: USA, 18,23,30,31 Italy, 26,27 Austria, 24,28 Turkey, 33 Sweden, 25 Korea, 32 Germany, 29 the Netherlands 35 and Brazil. 34 Eleven studies used the RDC/TMD protocol, 18,23,[25][26][27]29,[31][32][33][34][35] two studies used the CDC/TMD, 24,28 and one study used the DC/TMD.…”