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. 2015 Oct 8;79(5):589–593. doi: 10.5935/1808-8694.20130105

Graph 4.

Graph 4

Comparison of results for ‘hawking' in the Reflux Symptom Index (RSI) of sleepy and non-sleepy snorers with suspected obstructive sleep apnea (OSA). The dark grey bar represents mild/moderate hawking and the light grey bar represents moderate/severe hawking.