. Author manuscript; available in PMC: 2009 Sep 1.
Published in final edited form as: Hum Immunol. 2009 Jan 22;70(3):195–199. doi: 10.1016/j.humimm.2008.12.010
© 2009 American Society for Histocompatibility and Immunogenetics. Published by Elsevier Inc. All rights reserved.