Count | |
| 3 | |
| 4 | |
| 4 | |
| 1 | |
| 2 | |
| 1 | |
| 1 | |
| 18 | |
| 22 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 3 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
Purines/chemical synthesis/chemistry/metabolism/*pharmacology | 1 |
| 1 | |
| 5 | |
| 1 | |
| 1 | |
| 2 | |
| 17 | |
| 4 | |
| 57 | |
| 1 | |
| 6 | |
| 1 | |
| 1 | |
| 2 | |
| 2 | |
| 1 | |
| 1 | |
| 3 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 3 | |
| 1 | |
| 1 | |
Purines/administration & dosage/*pharmacokinetics/therapeutic use | 1 |
Purines/administration & dosage/*pharmacokinetics/pharmacology | 1 |
| 3 | |
| 1 | |
| 12 | |
| 7 | |
| 3 | |
| 1 | |
| 2 | |
| 4 | |
| 1 | |
| 1 | |
| 2 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 9 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 2 | |
| 3 | |
| 2 | |
| 1 | |
| 2 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 1 | |
| 4 | |
| 1 | |
| 1 | |
| 1 | |
| 7 | |
| 4 | |
| 2 | |
| 3 | |
| 1 | |