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(CNN) -- Olympic gold medalist Michael Phelps admitted to "regrettable" behavior Sunday and vowed it wouldn't happen again after a British newspaper published a photograph of the swimmer smoking from a bong

Given that most patients were extubated very rapidly, it is unlikely that they truly required intubation

Cost Difference in India Cigarette Users Average smoker spends 2,0005,000 per month Long-term cost becomes very high Vape Users One-time device cost Monthly e-liquid/pod cost is lower Nic Salt pods last longer than cigarette packs Verdict: Vaping is usually cheaper over time compared to daily cigarette smoking

Toll-like receptors (TLRs): An old family of immune receptors with a new face in cancer pathogenesis

Each year, smoking kills five million people and passive smoking kills 600,000 people