This statement has been compiled using information from a number of reliable sources including literature searches from the Cochrane and Medline databases.
Cancerbackup would like to thank the following people for their help in writing this statement, Dr Chris Parker, Senior Lecturer in Clinical Oncology, at the Institute of Cancer Research, The Royal Marsden Hospital, Sutton; Dr Terry Priestman, Clinical Oncologist and Medical Editor for Cancerbackup and Cancerbackup’s Specialist Cancer Information Nurses.