Intensive care medicine MCQs [electronic resource] : multiple choice questions with explanatory answers / authors, Shoneen Abbas MBChB MRCP FFICM, Ruth Herod MBChB FRCA FFCIM, Daniel Horner BA MBBS MD MRCP(UK) FCEM FFICM ; editor, Steve Benington MBChB MRCP FRCA EDIC FFICM