The main features of initial epithelial injury are mucociliary dysfunction, goblet cell hyperplasia, and disruption of tight junction proteins, changes that together impair mucociliary clearance and compromise barrier integrity ( Expansion Phase Immune cell recruitment mediator release critical pathway activation transition to senescence Small airway inflammation is induced by chronic exposure to cigarette smoke and atmospheric particulate matter
Our second evidence synthesis was a systematic review of primary studies on the benefits and harms of e-cigarettes for smoking cessation,23 which updated an existing Cochrane review from 2016.86 Although Cochrane has since transformed its review into a living systematic review,24 it had not yet done so when we developed our evidence review protocol.87 The Evidence Review and Synthesis Centre at the University of Ottawa conducted the systematic reviews according to our protocol.87 Peer-reviewed search strategies (using the Peer Review of Electronic Search Strategies checklist88) were conducted in MEDLINE, Embase, PsycINFO, and the Cochrane Library in September 2020
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They can easily get stuck somewhere and cause a serious blockage
This time around we'll assess how well its interior coddles occupants
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