FES: FESS Effectiveness Study: a multi-centre randomised controlled trial studying the effectiveness of functional endoscopic sinus surgery (FESS) in adult patients with chronic rhinosinusitis/nasal polyps unresponsive to medical therapy Not provided at time of registration

• Country None
• organs None
• Specialty None

The efficacy of the combination of allergen vaccination and vitamin D3 in the reduction of allergen-specific nasal responses. A placebo controlled trial Not provided at time of registration

• Country Netherlands
• organs None
• Specialty None