About the Authors Mike Leach, MB ChB, FRCP, FRCPath, is Consultant Haematologist and Honorary Senior Lecturer at the Haematology Laboratories and West of Scotland Cancer Centre in Gartnavel General Hospital, Glasgow, UK. Barbara J. Bain, MB BS, FRACP, FRCPath, is Professor of Diagnostic Haematology at St Mary’s Hospital Campus, Imperial College London, and Consultant Haematologist at St Mary’s Hospital, London, UK.