関連ワード:  what do levels mean in hospitals    what does level 4 mean in hospital    what does level 3 mean in hospital    what does level 2 mean in hospital    what does level 1 mean in hospital    what does level 5 mean in hospital    what does level 6 mean in hospital    what does level 1 trauma mean in hospital    what do trauma levels mean for hospitals    what does trauma level mean for hospitals