| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| gross et al. 2017 pnas | 0.24 | 0.9 | 7543 | 68 |
| j ding et al. pnas 2018 | 0.71 | 0.9 | 9143 | 32 |
| chen et al. 2018 pnas | 0.71 | 0.2 | 3549 | 10 |
| bar-on et al. pnas 2019 | 1.15 | 0.1 | 5095 | 90 |
| fang et al. 2018 pnas | 0.43 | 0.7 | 2018 | 43 |
| edwards j. et al. 2015 . pnas | 1.25 | 0.6 | 2971 | 53 |
| zhao et al. pnas 2017 | 1.82 | 0.5 | 2202 | 19 |
| sefah et al pnas 2014 | 0.85 | 0.4 | 3368 | 85 |
| qi et al. 2014 pnas | 1.28 | 0.4 | 8783 | 24 |
| burdick et al pnas 2020 | 1.72 | 0.2 | 2179 | 84 |
| zhu et al. 2018. pnas | 1.33 | 0.1 | 4275 | 62 |
| barnett et al. 2021 pnas | 0.57 | 0.2 | 5153 | 56 |
| provost et al. pnas 2020 | 0.61 | 0.6 | 1684 | 64 |
| shim et al pnas 2012 | 0.66 | 0.7 | 4923 | 3 |
| https://www.pnas.org/content/117/12/6640 | 1.08 | 0.7 | 2408 | 67 |
| the amount of was further decreased pnas | 0.94 | 0.2 | 2988 | 30 |
| pnas 113 4924 2016 | 1.87 | 1 | 6253 | 60 |
| impact factor of pnas | 0.76 | 0.6 | 8878 | 31 |
| pnas 117 5582 2020 | 0.37 | 0.9 | 3569 | 72 |
| study published in the journal pnas | 0.1 | 0.1 | 8702 | 27 |
| pnas and impact factor | 0.05 | 0.2 | 3670 | 51 |
| http://www.pnas.org/content/115/30/e7091 | 0.11 | 0.1 | 1003 | 17 |
| www.pnas.org/cgi/doi/10.1073/pnas | 1.51 | 0.2 | 8138 | 74 |
| https://www.pnas.org/latest | 1.27 | 0.8 | 2112 | 50 |
