[1] Univ Michigan, Pathol, Ann Arbor, MI 48109 USA
[2] Univ Alabama Birmingham, Pathol, Birmingham, AL USA
[3] Puget Sound Blood Ctr, Seattle, WA 98104 USA
[4] Childrens Hosp Philadelphia, Philadelphia, PA 19104 USA
[5] Amer Red Cross, St Paul, MN USA
[6] Columbia Univ, Pathol, New York, NY USA
[7] Mayo Clin, Pathol, Rochester, MN USA
[8] Childrens Natl Med Ctr, Washington, DC 20010 USA