“…Two papers were studies of diagnostic accuracy (18,19). The remainder of the articles included seven reviews (10,13,(15)(16)(17)24,34), two case studies (8,9), eight comparative studies (12,14,22,23,27,28,30,31), and 10 noncomparative studies (2,3,11,20,21,25,26,29,32,33), of varying quality. The findings are presented below in three sections corresponding to the three research questions.…”