Secondary outcomes
1. Ability to ingest a partial serving of cow’s milk without adverse reactions (the dose varies according to the different definitions in each study).
2. Side effects during OIT.
3. Change in skin-prick test(SPT) size, specific IgE level, specific IgG4 level Data was analyzed on an intention-to-treat (ITT) basis whenever possible.
4. Subgroup of the effect of adjuvant treatments such as OIT with baked milk or omalizumab was analyzed if possible.