[1] JOHNS HOPKINS HOSP, ADULT MED UNIT DOSE, BALTIMORE, MD 21205 USA
[2] JOHNS HOPKINS HOSP, PHARM SERV, BALTIMORE, MD 21205 USA
[3] UNIV MARYLAND, BALTIMORE, MD 21201 USA
[4] UNIV MARYLAND, UNIV HOSP, SCH PHARM, INST PHARM PROGRAMS, BALTIMORE, MD 21201 USA