Fig. 2From: Early nonreactivity in the conjunctival provocation test predicts beneficial outcome of sublingual immunotherapyFlowchart of the tree pollen study population. *Due to an unforeseen shortage of CPT allergen solution on the manufacturer’s part, the CPT at V3 was optional, depending whether sufficient allergen solution was available. CPT conjunctival provocation test, UA unit of allergen, V visitBack to article page