[1] UCSF, Dept Lab Med, San Francisco, CA 94115 USA
[2] Univ Rosario, Sch Med & Hlth Sci, Publ Hlth Res Grp, Bogota, Colombia
[3] Fdn Hemoctr Buenos Aires, Sch Med Sci & Hlth Sci, Buenos Aires, Argentina
[4] Clin Colsanitas, Banco Sangre Lab Clin, Grp Keralty, Bogota, Colombia
[5] Ctr Sangre Valparaiso, Valparaiso, Chile
[6] Banco Sangre Hosp, Gen Accid Inst Guatemalteco Segur Social, Guatemala City, Guatemala
[7] Univ Autonoma Baja California Sur, Baja California Sur, Mexico
[8] Red Salud UC Christus, Santiago, Chile
[9] Canadian Blood Serv, Brampton, ON, Canada