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Table 2 Main methodological characteristics of included articles

From: Subcutaneous immunotherapy with depigmented-polymerized allergen extracts: a systematic review and meta-analysis

No. Year First author Duration (months) Sites Allergen Scores in Jadad scale
Treatment period Evaluation Period Randomization Blind Drop-outs Total
1 2010 Pfaar 12/24 4 Multicenter Birch pollen 1 2 1 4
2 2013 Pfaar 12/24 7 Multicenter Birch/grass 2 2 1 5
3 2012 Pfaar 12/24 4.5 Multicenter Grass 1 2 1 4
4 2010 Höiby  12/24 1 Multicenter Birch 2 2 1 5
5 2006 Colás 12 1 Monocenter Russian thistle 1 1 1 3
6 2005 Ameal 12 1 Monocenter House dust mite 1 1 1 3
7 2005 Álvarez-Cuesta 12 1 Monocenter Grass/olive 1 1 0 2
8 2006 García-Robaina 12 12 Monocenter House dust mite 1 1 1 3