Repeatability and replicability of the Respiratory Symptom Experience Scale (RSES): internal and external validation of smoking-status differences in respiratory symptoms.
Caponnetto P, Spicuzza L, Caratozzolo D, Belsey J, Campagna D, Nadir M, John I, Anastasi E, Geraci G, Pluym N, Scherer M, Polosa R
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