We produce patient booklets which are based on our clinical guidelines. These patient booklets explain the recommendations in the clinical guideline; and help to make patients aware of the tests and treatments they should expect to receive from the NHS.
These patient booklets are a lay translation of the clinical guidelines. They are not intended to be general information leaflets.
This booklet has been withdrawn as it is over 10 years old.
Without a full review of the evidence it is not possible to be certain that the guideline:
If there is still a need for a guideline in this area, please propose a topic to the SIGN Executive.