https://www.selleckchem.com/TGF-beta.html
A high quality end-expiratory breath sample is required for a reliable gastrointestinal breath test result. Oxygen (O ) concentration in the breath sample can be used as a quality marker. This study investigated the characteristics of O concentration in the breath sample and the impact of using a correction factor in real-time breath measurement. This study includes two separate groups of patient data. Part 1 of the study analysed the patient's ability to deliver end-expiratory breath samples over a 2-year period (n=564). Part 2 of the study an
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