[1] UNIV MARYLAND,SCH MED,DEPT PATHOL,BALTIMORE,MD 21201
[2] UNIV MARYLAND,SCH MED,DEPT MED & RES TECHNOL,BALTIMORE,MD 21201
[3] VET AFFAIRS MARYLAND HLTH CARE SYST,PATHOL & LAB MED SERV,BALTIMORE,MD 21201
[4] MED CTR DELAWARE,INFECT DIS LAB,WILMINGTON,DE 19899