Table 1.
Year | Author | Region | Total | SEMS | Surgery | Concealment of allocation | Jaded score | Quality |
2009 | Cheung | Hongkong | 60 | 30 | 30 | Appropriant | 5 | High |
2010 | Pirlet | France | 48 | 24 | 24 | Appropriant | 5 | High |
2011 | Van Hooft | Holland | 98 | 47 | 51 | Appropriant | 5 | High |
SEMS: Self-expandable metallic stent.