1. From the Department of Pathology (Hardy, Jacobs), University of Maryland Medical Center, Baltimore.
2. From Pathology and Lab Chemistry (Mullins, Christenson), University of Maryland School of Medicine, Baltimore, Maryland.
3. From Laboratories of Pathology (Cox), University of Maryland Medical Center, Baltimore.
4. From Transfusion Medicine in Laboratories of Pathology (Murphy), University of Maryland School of Medicine, Baltimore, Maryland.
5. From the Department of Pathology (Koka), University of Maryland School of Medicine, Baltimore, Maryland.