4Giacomini M, Cook D, DeJean D. Life support decision making in critical care:identifying and appraising the qualitative research evi- dence[ J]. Crit Care Med,2009,37(4) :1475 -1482.
5Rusinova K, Pochard F, Kentish - Barnes N, et, al. Qualitative re- search:adding drive and dimension to clinical research [ J ]. Crit Care Med ,2009,37 ( 1 suppl) : 140 - 146.
6Sinuff T, Cook D, Giaeomini M, et al. How qualitative research can comibute in the intensive care unit [ J]. Crit Care Med, 2007,35 (9) :2083 -2089.
