Multiple at-risk groups have lower lung function during the grass pollen season - N. Sabrina Idrose; Don Vicendese; E. Haydn Walters; Jennifer L. Perret; Jennifer J. Koplin; Jo A. Douglass; Rachel CA. Tham; Peter Frith; Dinh S. Bui; Adrian J. Lowe; Michael J. Abramson; Gayan Bowatte; et al. (Allergology International)