One of the most common symptoms of obstructive sleep apnea is snoring. Some people are aware of it. Some people are not, not everybody has sleep. Apnea has snoring, but most people do. It means there's some resistance between their nose and the air. And that makes the sound of snoring. And if the obstruction is beyond just the nose and further down in the airway, then we call it obstructive sleep apnea. Often people with obstructive sleep apnea are tired. They don't get good sleep at night. So they're sleepy during the day and during their night's sleep, they awaken multiple times. Sometimes they don't know why they're awakening, but oftentimes they're awakening literally with a resuscitative snort.