Planned sinus surgery includes bilateral ethmoidectomy (if judged necessary) and frontal sinus enlargement using Draf II (A or B) dissection or balloon dilation, with minimum of 5-mm diameter opening created. [clinicaltrials_resource:8c2dce596aa19b3ad3aad9a289225032]

Planned sinus surgery includes bilateral ethmoidectomy (if judged necessary) and frontal sinus enlargement using Draf II (A or B) dissection or balloon dilation, with minimum of 5-mm diameter opening created. [clinicaltrials_resource:8c2dce596aa19b3ad3aad9a289225032]