He confirmed he has asked Labour's Ann Clwyd, MP for the Cynon Valley, to examine how NHS hospitals could deal with complaints better in future.
In December, she criticised the care given to her late husband at Cardiff's University Hospital of Wales.
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Today's poll is not a forecast of what will happen on election day, but it is a snapshot of Welsh public opinion.
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Could Wales be on the brink of an election earthquake? Poll suggests Tories on course to win majority of Welsh parliamentary seats.