97
Participants
Start Date
October 23, 2018
Primary Completion Date
October 23, 2024
Study Completion Date
October 23, 2024
Extended endoscopic sinus surgery
ESS of all sinuses
Limited endoscopic sinus surgery
Partial ethmoidectomy
Academic Medical Center, Amsterdam
Department of Otorhinolaryngology, Helsinki University Hospital, Helsinki
Kuopio University Hospital, Kuopio
Helsinki University Central Hospital
OTHER