What is the fine-grained topic of the following text: Purpose of reviewThis review describes the current state-of-the-art with respect to the modification of red blood cells for creating quality controls for use in immunohaematology.Recent findingsThe author has identifed five technologies able to create modified red blood cells potentially suitable for use in quality control. Only return the topic.
Modification of Red Blood Cells for Quality Control in Immunohaematology