Chronic Respiratory Symptoms with Normal Spirometry. A Reliable Clinical Entity?
Rodriguez-Roisin R, Han MK, Vestbo J, Wedzicha JA, Woodruff PG, Martinez FJ. Chronic Respiratory Symptoms with Normal Spirometry. A Reliable Clinical Entity? Am J Respir Crit Care Med. 2017 Jan 01; 195(1):17-22.