| http://www.w3.org/ns/prov#value | - A method for treating a patient is provided, including the steps of: inserting an endoscope into or through an endoscope channel of a guide device that includes an elongated shaft; inserting the guide device through a nostril of the patient; advancing a distal end portion of the guide device toward a sinus ostium of the patient; advancing a distal end portion of the endoscope distally of the dista
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