Review Article
Probiotics as Additives on Therapy in Allergic Airway Diseases: A Systematic Review of Benefits and Risks
Table 2
Characteristics of studies excluded from the review.
| Study | Reason for exclusion |
| Trapp et al. 1993 [20] | Groups 1 and 2 randomized and double blinded, but group 3 were those who did not want to eat yogurt. |
| Ishida et al. 2005 [21] | Randomized single-blind study with quality score = 0. |
|
|