Administration, Intranasal ; Adult ; Aerosols ; Androstadienes ; therapeutic use ; Anti-Inflammatory Agents ; administration & dosage ; therapeutic use ; Budesonide ; therapeutic use ; Child ; Female ; Fluticasone ; Humans ; Male ; Mometasone Furoate ; Nasal Polyps ; drug therapy ; Pregnadienediols ; therapeutic use ; Rhinitis, Allergic, Perennial ; drug therapy ; epidemiology ; pathology ; Rhinitis, Allergic, Seasonal ; drug therapy ; Singapore ; epidemiology ; Sinusitis ; drug therapy ; Triamcinolone Acetonide ; therapeutic use