Stephanie Holm, a pediatrician, environmental epidemiologist and co-director of the Western States Pediatric Environmental Health Specialty Unit at the University of California, San Francisco, says that currently there is a lot of interestbut also a lot of confusionabout how well different mask materials filter out particles
"Council adopts tough smoking rules", San Antonio Express-News , August 19, 2010 "States and Municipalities with Laws Regulating Use of Electronic Cigarettes" (PDF)
Its really impossible to predict, said the director of the FDAs tobacco center, Mitch Zeller, who noted that a previous regulation on menthol received more than 175,000 comments, all of which the FDA was required to consider
Billed as a beginner-friendly version of 75 Hard, a less-intense version called 75 Soft has also been popping up online
10.1016/j.addbeh.2013.08.030 43
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