Changes in peak expiratory flow rates using two head-tilt/chin-lift maneuver angles in young healthy conscious volunteers.

PLoS One · 2019 · PMC6799904 · PMID 31626679

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a decreasing trendno p-value reported

However, the percentage change post-HT/CL #2 compared to pre-HT/CL levels was less than double the percentage change post-HT/CL #1 compared to pre-HT/CL levels, indicating a decreasing trend in the PEFR increase.

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