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The number of calls made to California's poison-control centers involving vaping exposures to children increased from seven in 2012 to 154 in 2014, the state reported
However, there are many different sources of information and it can be hard to tell exactly how bad the air is and what we should do
As new research emerges, the guidelines may change further
The most widely used cell-free systems are based on Escherichia coli extract (ECE), wheat germ extract (WGE), rabbit reticulocytes lysate (RLL) and insect cell extract (ICE)
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