Table 8 Keywords with frequency ≥50.
Rank | Frequency | Centrality | Keywords | Rank | Frequency | Centrality | Keywords |
|---|---|---|---|---|---|---|---|
1 | 885 | 0.02 | Erectile dysfunction | 21 | 83 | 0.20 | Endothelium-dependent relaxation |
2 | 426 | 0.01 | Nitric oxide | 22 | 82 | 0.05 | Impotence |
3 | 313 | 0.06 | Nitric oxide synthase | 23 | 82 | 0.04 | Sildenafil |
4 | 306 | 0.01 | Corpus cavernosum | 24 | 79 | 0.03 | Cardiovascular disease |
5 | 251 | 0.01 | Smooth muscle | 25 | 77 | 0.00 | Endothelial progenitor cell |
6 | 195 | 0.00 | Endothelial dysfunction | 26 | 75 | 0.03 | Smooth muscle cell |
7 | 180 | 0.00 | Dysfunction | 27 | 67 | 0.02 | Sexual dysfunction |
8 | 177 | 0.01 | Men | 28 | 67 | 0.03 | Disease |
9 | 176 | 0.01 | Expression | 29 | 62 | 0.02 | Mechanism |
10 | 166 | 0.03 | Oxidative stress | 30 | 61 | 0.04 | Coronary artery disease |
11 | 149 | 0.01 | Penile erection | 31 | 61 | 0.01 | Activation |
12 | 123 | 0.02 | Diabetes mellitus | 32 | 60 | 0.00 | Model |
13 | 111 | 0.06 | Endothelial cell | 33 | 59 | 0.10 | Tissue |
14 | 109 | 0.09 | Endothelial growth factor | 34 | 58 | 0.09 | Radical prostatectomy |
15 | 102 | 0.01 | Risk factor | 35 | 57 | 0.07 | Endothelium |
16 | 98 | 0.01 | Relaxation | 36 | 57 | 0.01 | Stem cell |
17 | 97 | 0.06 | Rat model | 37 | 53 | 0.05 | Erectile function |
18 | 90 | 0.00 | Cell | 38 | 52 | 0.01 | Metabolic syndrome |
19 | 87 | 0.02 | Therapy | 39 | 51 | 0.01 | Prevalence |
20 | 84 | 0.01 | Rat |
