Stedman's Online Medical Dictionary. Wolters Kluwer Health, Inc. 2009. Lippincott Williams & Wilkins. Accessed May 29, 2014.
Dorland's Online Medical Dictionary. Elsevier. 2013. Accessed May 29, 2014.
Yi-Bin Chen, MD, Leukemia/Bone Marrow Transplant Program, Massachusetts General Hospital, Boston, MA. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.