Law Brandon F, Pearce Terri, Siegel Paul D
Allergy and Clinical Immunology Branch. Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, USA.
J Occup Environ Hyg. 2011 Jul;8(7):D68-72. doi: 10.1080/15459624.2011.584841.