University of Medicine and Dentistry of New Jersey–New Jersey Medical School, Newark, New Jersey
Readers are invited to submit letters for publication in this department. Submit them to: The Editor, Journal of Occupational and Environmental Medicine, 605 Worcester Road, Towson, MD 21286-7834. Letters should be sent as hard copy with an accompanying diskette and should be designated “For Publication.”
Note added in proof: On October 3, 2006, Cellestis, Inc. issued a product information letter that noted an incompatibility problem between some lots of Becton-Dickinson Sodium Heparin Vacutainer Blood Collection Tubes and the QFT-G test, resulting in a significant increase in the rate of indeterminate results due to high Nil background values. Cellestis now recommends using Lithium Heparin collection tubes.