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==Factor IV ==
 
==Factor IV ==
 
+
Factor IV is calcium, which is necessary at several stages of coagulation. Hypocalcaemia at a level sufficient to impair haemostasis is incompatible with life.
* Factor IV is calcium.
  −
** Necessary at several stages of coagulation.
  −
* '''Hypocalcaemia''' at a level sufficient to impair haemostasis is incompatible with life.
  −
** There is therefore no bleeding defect associated with hypocalcaemia.
      
==Factor VII==
 
==Factor VII==
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