The effect of playing a wind instrument or singing on risk of sleep apnea: a systematic review and meta-analysis The effect of playing a wind instrument or singing on risk of sleep apnea: a systematic review and meta-analysis Download Slow-oscillation activity is reduced and high frequency activity is elevated in older adults with insomnia The effects of mandibular advancement appliance therapy on jaw-closing muscle activity during sleep in patients with obstructive sleep apnea: a 3–6 months follow-up