Figure 1From: Evaluation of nasal symptoms induced by platelet activating factor, after nasal challenge in both healthy and allergic rhinitis subjects pretreated with rupatadine, levocetirizine or placebo in a cross-over study designSqueme and design of study. PAF: platelel-activating factor; AcR: acoustic rhinometry; T4SS: total 4-symptoms score (evaluated by Likert and visual analogic scales) FEV1: Forced expiratory volume in 1 second.Back to article page