nurses' opinions. Validity:(2a) admission rates:(1) 100%,(2) 88%,(3) 61%,(4) 2.8%,(5)
0.6%;(2b) n= 57; 31 patients already dead and 26 patients received resuscitation (21–level
1, 5–level 2). Efficacy: 3 (a) Level 1–1 min; Level 2–5 min; Level 3–21 min; Level 4–56 min;