Asthmatics and ex-smokers respond early, heavy smokers respond late to mailed surveys in Italy.
Authors:
Verlato G, Melotti R, Olivieri M, Corsico A, Bugiani M, Accordini S, Villani S, Migliore E, Marinoni A, Pirina P, Carrozzi L, Bortolami O, Rava M, de Marco R; for the ISAYA study group.
Journal:
Respir Med 2010; 104: 172-9.