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A wave is a disturbance that propagates from its source, repeating itself periodically, and is typically associated with simple harmonic motion. Mechanical waves are governed by Newton's laws and require a medium to travel. A medium is a substance in which a mechanical wave propagates, and the medium produces an elastic restoring force when it is deformed.
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Updated: May 17, 2026

Systematic Bronchoscopy: the Four Landmarks Approach

Systematic Bronchoscopy: the Four Landmarks Approach

Published on: June 23, 2023

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Jarrod D Frizzell, Michel A Boivin

The New England Journal of Medicine

|October 12, 2012

Summary

No abstract available in PubMed .

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