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APA Citation
Friedman, M., Hamilton, C., Samuelson, C. G., Lundgren, M. E., & Pott, T. (2013). diagnostic Value of the Friedman Tongue Position and Mallampati Classification for Obstructive Sleep Apnea: A Meta‐analysis. Otolaryngology--head and neck surgery, 148(4), 540–547. http://access.bl.uk/ark:/81055/vdc_100174909130.0x00003d