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The following article by a well known MD, who deals extensively with sleep disorders, is quoted here for those desiring more knowledge concerning UARS (Upper Airway Resistance Syndrome), RERA (Respiratory Effort-Related Arousals), and flow limitations. The author was considered somewhat of a rebel concerning UARS in the earlier days of Sleep Apnea. Many of his assertions have been proven correct since those days. For an example of how bilevel pressure helped an Apnea Board member with flow limitations and example Sleepyhead [[OSCAR]] graphs, see the [[Flow Limitation]] article. On to the article.