Differences between absolute and predicted values of forced expiratory volumes to classify ventilatory impairment in chronic obstructive pulmonary disease.
Checkley W, Foreman MG, Bhatt SP, Dransfield MT, Han M, Hanania NA, Hansel NN, Regan EA, Wise RA. Differences between absolute and predicted values of forced expiratory volumes to classify ventilatory impairment in chronic obstructive pulmonary disease. Respir Med. 2016 Feb; 111:30-8.