Measurable residual disease (MRD) testing by a quantitative patient-specific molecular assay performed on bone marrow (or, in a patient with T-cell acute lymphoblastic leukaemia, performed on a peripheral blood sample if bone marrow cannot be collected) from a patient diagnosed with acute lymphoblastic leukaemia treated with combination chemotherapy or after salvage therapy, requested by a specialist or consultant physician practising as a haematologist or oncologist, other than a service associated with a service to which item 73313 applies