1. Department of Pathology, St Joseph Mercy Hospital, Ann Arbor, Michigan, USA
2. Warde Medical Laboratory, Ann Arbor, Michigan, USA
3. Methods Consultants of Ann Arbor, Ypsilanti, Michigan, USA
4. Division of Infectious Diseases, Department of Internal Medicine, St Joseph Mercy Hospital, Ann Arbor, Michigan, USA
5. Department of Infection Prevention and Control, St Joseph Mercy Hospital, Ann Arbor, Michigan, USA