“…A total of 50 studies detected the miRNAs in blood such as the whole blood, plasma, serum, and peripheral blood mononuclear cells (PBMC) [ 6 , 7 , 11 , 20 – 24 , 26 , 29 – 35 , 37 , 39 – 42 , 44 – 47 , 49 – 54 , 56 – 64 , 66 – 68 ], while the remaining studies were detected in nonblood samples (7 tissue [ 5 , 25 , 28 , 55 , 68 ], 1 pleural effusion [ 43 ], 12 sputum [ 12 , 14 , 18 , 19 , 27 , 36 , 38 , 48 , 65 ], and 1 BAL [ 13 ]). We evaluated 45 studies for assessing the diagnostic value of multiple miRNAs and 26 studies [ 5 , 6 , 11 , 20 , 22 , 24 – 26 , 33 – 37 , 39 – 41 , 43 , 47 , 50 , 51 , 55 , 57 , 58 , 60 , 67 , 68 ] of single miRNA.…”