8Cavailles A, Brinchauh-Rabin G, Dixmier A, et al. Comorbidities of COPD [J]. European Respiratory Review, 2013, 22 (130) : 454 - 475.
9Varraso R, Camargo C A. More evidence for the importance of nu- tritional factors in chronic obstructive pulmonary disease [ J ]. The American journal of clinical nutrition, 2012, 95 ( 6 ) : 1301 - 1302.
10Itoh M, Tsuji T, Nemoto K, et al. Undernutrition in patients with COPD and its treatment[J]. Nutrients, 2013, 5 (4) : 1316 - 1335.