4Piras O, Travaglino F, Autunno A, et al. Chronic systemic inflammatory syndrome in patients with AECOPD presenting toemergency depart- ment[J]. Eur Rev Med Pharmacol Sci,2012,16( 1 ) :57-61.
5Chen H, Song Z, Qian M, et al. Selection of disease-specific biomarkers by integrating inflammatory mediatorswith clinical informatics in AE- COPI) patients: a preliminary study[ J]. J Cell Mol Med,2012, 16 (6) :1286-1297.
6Haifeng W, Jiansheng L, Suyun L, et al. Effect of sequential treatment with syndrome differentiation on acuteexacerbation of chronic obstruc- tive pulmonary disease and "AECOPD Risk-Window" : study protocol for a randomized placebo-controlled trial [ J ]. Trials,2012,13 ( 2 ) :40- 44.
7Martinson BC, Crain AL, Sherwood NE, et al. Population reach and recruitment bias in a maintenance RCT in physically activeolder a- dults[ J]. J Phys Act Health,2010,7( 1 ) :127-135.
8Aanerud M, Braut H, Wentzel-Larsen T, et al. Non-response in tele- phone surveys of COPD patients does not introduce bias [ J ]. J Telemed Telecare,2013,19( 1 ) :40-44.