TABLE 1.

Investigators and laboratories participating in the CLSI M23 tier 2 QC study

Investigator	Participating laboratory
M. Castanheira	JMI Laboratories, North Liberty, IA
D. Dressel	IHMA, Schaumburg, IL
C. Knapp	Thermo Fisher Scientific, Oakwood Village, OH
C. Pillar	Microbiologics, Kalamazoo, MI
P. Simner	Johns Hopkins, Baltimore, MD
D. Diekema	University of Iowa Hospitals and Clinics, Iowa City, IA
S. Riedel	Beth Israel-Deaconess Medical Center, Boston, MA
D. Snydman	Tufts University Medical Center, Boston, MA