Repeat coagulation screen confirms a prolonged APTT, with the remainder of the clotting screen being within normal limits.

Mixing studies are performed and the APTT corrects.  What does this show?

If the APTT did not correct on mixing what would be your advice for this patient?

On further review he denies any family history of bleeding.  What other information would be useful to assess his bleeding history?

On examination there is no audible murmur.  His chest is clear.  He has no palpable lymph nodes or hepatosplenomegaly.

Any further investigations needed to manage this patient?