1. Sahlstrand-Johnson P, Ohlsson B, Von Buchwald C, Jannert M, Ahlner-Elmqvist M (2011) A multi-centre study on quality of life and absenteeism in patients with CRS referred for endoscopic surgery. Rhinology 49(4):420–428. doi: 10.4193/Rhino11.101
2. Hastan D, Fokkens WJ, Bachert C, Newson RB, Bislimovska J, Bockelbrink A, Bousquet PJ, Brozek G, Bruno A, Dahlen SE, Forsberg B, Gunnbjornsdottir M, Kasper L, Kramer U, Kowalski ML, Lange B, Lundback B, Salagean E, Todo-Bom A, Tomassen P, Toskala E, van Drunen CM, Bousquet J, Zuberbier T, Jarvis D, Burney P (2011) Chronic rhinosinusitis in Europe—an underestimated disease. A GA(2)LEN study. Allergy 66(9):1216–1223. doi: 10.1111/j.1398-9995.2011.02646.x
3. Lange B, Holst R, Thilsing T, Baelum J, Kjeldsen A (2013) Quality of life and associated factors in persons with Chronic Rhinosinusitis in the general population. Clin Otolaryngol Off J ENT-UK Off J Netherlands Soc Oto-Rhino-Laryngol Cervico-Facial Surg. doi: 10.1111/coa.12189
4. Hopkins C, Browne JP, Slack R, Lund V, Topham J, Reeves B, Copley L, Brown P, van der Meulen J (2006) The national comparative audit of surgery for nasal polyposis and chronic rhinosinusitis. Clin Otolaryngol Off J ENT-UK Off J Netherlands Soc Oto-Rhino-Laryngol Cervico-Facial Surg 31(5):390–398. doi: 10.1111/j.1749-4486.2006.01275.x
5. Ragab SM, Lund VJ, Scadding G (2004) Evaluation of the medical and surgical treatment of chronic rhinosinusitis: a prospective, randomised, controlled trial. Laryngoscope 114(5):923–930. doi: 10.1097/00005537-200405000-00027