ACKNOWLEDGMENTS
We would like to acknowledge Donald Booher for industrial hygiene equipment and logistical support, Vitaly Aizenberg for technical advice, Data Chem Laboratories Inc. (Salt Lake City, Utah) for analytical support, Stefanie Evans for health communication assistance, and Ellen Galloway for editorial support.
The findings and conclusion in this report are those of the authors and do not necessarily represent the views of the National Institute for Occupational Safety and Health. Mention of any company or product does not constitute endorsement by NIOSH.