| Confronting two-pair primer design for enzyme-free SNP genotyping based on a genetic algorithm Recent countries visiting this post |  |
 | 7 | United States |
 | 2 | Europe |
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| Confronting two-pair primer design for enzyme-free SNP genotyping based on a genetic algorithm Recent countries visiting this post | |
| 7 | United States |
| 2 | Europe |
| 1 | Egypt |
| 1 | Vietnam |