1 | exp migraine |
2 | limit 1 to meta analysis |
3 | systematic review.mp. |
4 | 1 and 3 |
5 | 2 or 4 |
6 | Meta analysis |
7 | systematic review.mp. |
8 | 1 and (6 or 7) |
9 | 4 or 8 |
10 | remove duplicates from 9 |
11 | limit 10 to (editorial or letter) |
12 | 10 not 11 |
13 | limit 12 to yr="2005–2014” |