[1] UNIV OKLAHOMA, HLTH SCI CTR, DEPT FAMILY MED, OKLAHOMA CITY, OK 73190 USA
[2] UNIV OKLAHOMA, HLTH SCI CTR, DEPT FAMILY PRACTICE, OKLAHOMA CITY, OK 73190 USA
[3] UNIV OKLAHOMA, HLTH SCI CTR, DEPT PATHOL, OKLAHOMA CITY, OK 73190 USA
[4] UNIV OKLAHOMA, HLTH SCI CTR, COLL MED, DEPT PEDIAT, NEONATOL SECT, OKLAHOMA CITY, OK 73190 USA
[5] SYLVAN N GOLDMAN OKLAHOMA BLOOD INST, RED CELL REFERENCE LAB, OKLAHOMA CITY, OK USA