Human Cell Differentiation Molecules, an organisation which runs HLDA (Human Leucocyte Differentiation Antigens) Workshops and names and characterises CD molecules.

The mission of HCDM is to characterise the structure, function and distribution of leucocyte surface molecules and other molecules of the immune system.

The next HLDA Workshop, HLDA9, will be Chaired by Pablo Engel, Immunology Unit. Department Cellular Biology and Pathology. Medical School; University of Barcelona. Casanova 143. Barcelona E-08036.

HCDM regrets to announce that David Mason, a member of Council and long-time HCDM and HLDA stalwart, passed away early in February. An appreciation of David can be found on the "Links" page under "Notices".