JOHN C BEIER -
Department of Pathobiology, The Johns Hopkins University, School of Hygiene and Public Health, 615 N. Wolfe St., Baltimore, Maryland 21205, USA
JOHN STRANDBERG -
Division of Comparative Medicine and Department of Pathology, The Johns Hopkins Medical Institutions, Baltimore, Maryland 21205, USA
MICHAEL K STOSKOPF -
Division of Comparative Medicine and Department of Pathology, The Johns Hopkins Medical Institutions, Baltimore, Maryland 21205, USA
CAROLYN CRAFT -
Division of Comparative Medicine and Department of Pathology, The Johns Hopkins Medical Institutions, Baltimore, Maryland 21205, USA