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Community Q&A QuestionDo fake cigarettes harm you?wikiHow Staff EditorThis answer was written by one of our trained team of researchers who validated it for accuracy and comprehensiveness

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8 Airway problems from GERD: Asthma Chronic cough Bronchitis Emphysema Pneumonia Laryngitis Chronic Hoarseness Inflammation of throat Vocal cord ulcers Noncardiac chest pain The Causes of Indigestion and GERD Gastroesophageal reflux disease (GERD) occurs when the stomach acid contacts the tissues of the esophagus, mouth, sinuses, and lungs

This design was selected because the estimate of within-arm standard deviation (SD) from the external pilot study had a wide confidence interval and the interim analysis would allow for a more accurate estimation of the SD as a basis for assessing whether the expected effect size could be feasibly demonstrated

to measure this, put a straight pipe cleaner down the chamber, pinch it at the top, and then compare this height to the outside wall