Enhanced Soluble Interleukin 5 Receptor alpha expression in nasal polyposis - Gevaert, P; Bachert, C; Holtappels, G; Perez Novo, C; Van der Heyden, J; Fransen, L; Depraetere, S; Walter, H; van Cauwenberge, P; Tavernier, J (Allergy, 2003)