Barbara J. Bain is an Australian haematologist. She is Professor of Diagnostic Haematology at the Imperial College London Faculty of Medicine and a consultant at St Mary's Hospital, London. She is known as the author of reference textbooks in the field of haematology that form the core curriculum for laboratory morphology and pathology. She recently received an AM in the 2020 Queen's Birthday Honours and in 2018 a European Haematology Association Mentoring and Teaching Award.

Mike Leach is a haematologist with an interest in diagnostic haematopathology. He is a Consultant at the Beatson West of Scotland Cancer Centre and Gartnavel Laboratory in Glasgow, UK. He is known for a series of textbooks in this field with a focus on haematology diagnosis and the application of flow cytometry.