Clinical diagnosis of allergic rhinitis based on sneeze attacks, runny/blocked/itchy nose in the absence of a common cold during the previous 12 months. 
History of positive skin prick test or blood radio-allergosorbent test (RAST) to grass and/or ragweed pollen 

NCT00480129_inc_T1
Condition
allergic rhinitis
NCT00480129_inc_T2
Condition
sneeze attacks
NCT00480129_inc_T3
Condition
runny nose
NCT00480129_inc_T4
Condition
blocked nose
NCT00480129_inc_T5
Condition
itchy nose
NCT00480129_inc_T6
Condition
common cold
NCT00480129_inc_T7
Negation
absence
NCT00480129_inc_T8
Temporal
during the previous 12 months
NCT00480129_inc_T9
Measurement
skin prick test
NCT00480129_inc_T10
Value
positive
NCT00480129_inc_T11
Measurement
blood radio-allergosorbent test (RAST)
NCT00480129_inc_T12
Qualifier
grass
NCT00480129_inc_T13
Qualifier
ragweed pollen