Key points are not available for this paper at this time.
Division of Hematology, Brigham and Women's Hospital; Howard Hughes Medical Institute; and Harvard Medical School; Boston, Massachusetts, USA. Correspondence to D. Gary Gilliland, PhD, MD, Harvard Institutes of Medicine, 4 Blackfan Circle, Room 418, Boston MA 02115, USA; e-mail: email protected
D. Gary Gilliland (Sun,) studied this question.