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In patients following thoracotomy, which of the following are true?
a) Mediastinal infection has a mortality rate of 25%
b) Postoperative haematoma usually’ resolves on CT after 2 3 weeks
c) Pericardial effusion is not a normal finding follow ing sternotomy
d) Mediastinal air usually resolves within 7 days
e) CT is the technique of choice in establishing the diagnosis of mediastinitis

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