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Public health officials are "in desperate need of clarity" on electronic cigarettes to help guide policies, the nation's newly appointed surgeon general said Tuesday

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But since e-cigarettes still contain nicotine, which is highly addictive, critics fear they could be a potential stepping stone to more traditional tobacco products

Calculated using data from the U.S

These two MAPKs are known to be involved in MMP transcription by activating protein-1 (AP-1), a transcription factor predominantly resulting from the formation of a heterodimer between c-jun and c-Fos and mediating the regulation of several genes in response to various stimuli, including growth factors and cytokines 50

But some Pesach Seder traditions are universal