1. Irwin RS, Baumann MH, Bolser DC, Boulet LP, Braman SS, Brightling CE, et al. Diagnosis and management of cough executive summary: ACCP evidence-based clinical practice guidelines. Chest. 2006;129(Suppl 1):1S-23S.
2. Morice AH, McGarvey L, Pavord I, British Thoracic Society Cough Guideline Group. Recommendations for the management of cough in adults. Thorax. 2006;61(Suppl 1):i1-24.
3. Committee for the Japanese Respiratory Society Guidelines for Management of Cough, Kohno S, Ishida T, Uchida Y, Kishimoto H, Sasaki H, et al. The Japanese Respiratory Society guidelines for management of cough. Respirology. 2006;11(Suppl 4):S135-S186.
4. Irwin RS, French CL, Chang AB, Altman KW, CHEST Expert Cough Panel. Classification of cough as a symptom in adults and management algorithms: CHEST Guideline and Expert Panel Report. Chest. 2018;153(1):196-209.
5. Irwin RS, Boulet LP, Cloutier MM, Fuller R, Gold PM, Hoffstein V, et al. Managing cough as a defense mechanism and as a symptom: a consensus panel report of the American College of Chest Physicians. Chest. 1998;114 (2 Suppl Managing):133S-181S.
6. Morice AH. Post-nasal drip syndrome-a symptom to be sniffed at? Pulm Pharmacol Ther. 2004;17(6):343-345.
7. O'Hara J, Jones NS. ‘Post-nasal drip syndrome’: most patients with purulent nasal secretions do not complain of chronic cough. Rhinology. 2006;44(4):270-273.
8. Bardin PG, Van Heerden BB, Joubert JR. Absence of pulmonary aspiration of sinus contents in patients with asthma and sinusitis. J Allergy Clin Immunol. 1990;86(1):82-88.
9. Jiang M, Guan WJ, Fang ZF, Xie YQ, Xie JX, Chen H, et al. A critical review of the quality of cough clinical practice guidelines. Chest. 2016;150(4):777-788.
10. Sanu A, Eccles R. Postnasal drip syndrome. Two hundred years of controversy between UK and USA. Rhinology. 2008;46(2):86-91.
11. Pratter MR. Chronic upper airway cough syndrome secondary to rhinosinus diseases (previously referred to as postnasal drip syndrome): ACCP evidence-based clinical practice guidelines. Chest. 2006;129(1 Suppl):63S-71S.
12. Yu L, Xu X, Lv H, Qiu Z. Advances in upper airway cough syndrome. The Kaohsiung J Med Sci. 2015;31(5):223-228.
13. Niimi A. Geography and cough aetiology. Pulm Pharmacol Ther. 2007;20(4):383-387.
14. Lai K, Chen R, Lin J, Huang K, Shen H, Kong L, et al. A prospective, multicenter survey on causes of chronic cough in China. Chest. 2013;143(3):613-620.
15. Mahashur A. Chronic dry cough: diagnostic and management approaches. Lung India. 2015;32(1):44-49.
16. Nantha YS. Therapeutic-diagnostic evaluation of chronic cough amongst adults: causes, symptoms and management at the primary care level, Malaysia. J Family Med Prim Care. 2014;3(3):207-212.
17. Gao F, Gu QL, Jiang ZD. Upper airway cough syndrome in 103 children. Chin Med J. 2019;132(6):653-658.
18. Koo HK, Jeong I, Lee SW, Park J, Kim JH, Park SY, et al. Prevalence of chronic cough and possible causes in the general population based on the Korean National Health and Nutrition Examination Survey. Medicine (Baltimore). 2016;95(37):e4595.
19. Global Initiative for Asthma. Global strategy for asthma management and prevention – Update 2019. http://www.ginasthma.com. Accessed 18 September, 2020.
20. Grossman J. One airway, one disease. Chest. 1997;111(2):11S-16S.
21. Nobata K, Asanoi H. Proton pump inhibitor-responsive chronic cough without acid reflux: a case report. J Med Case Rep. 2007;1(1):1-5.
22. Ota K. The study of the evaluation methods to the severity of persistent cough. Allergology & Immunology. 2008;15:132-141. [in Japanese]
23. Bolser DC. Older-generation antihistamines and cough due to upper airway cough syndrome (UACS): efficacy and mechanism. Lung. 2008;186(Suppl 1):S74-S77.
24. Meltzer EO, Hamilos DL. Rhinosinusitis diagnosis and management for the clinician: a synopsis of recent consensus guidelines. Mayo Clin Proc. 2011;86(5):427-443.
25. Fokkens W, Lund V, Mullol J, European Position Paper on Rhinosinusitis and Nasal Polyps Group. European position paper on rhinosinusitis and nasal polyps 2007. Rhinol Suppl. 2007;20:1-136.
26. Scadding GK, Durham SR, Mirakian R, Jones NS, Drake-Lee AB, Ryan D, et al. BSACI guidelines for the management of rhinosinusitis and nasal polyposis. Clin Exp Allergy. 2008;38(2):260-275.
27. Slavin RG, Spector SL, Bernstein IL, Kaliner MA, Kennedy DW, Virant FS, et al. The diagnosis and management of sinusitis: a practice parameter update. J Allergy Clin Immunol. 2005;116(6):S13-S47.
28. Rosenfeld RM, Piccirillo JF, Chandrasekhar SS, Brook I, Ashok Kumar K, Kramper M, et al. Clinical practice guideline (update): adult sinusitis. Otolaryngol Head Neck Surg. 2015;152(Suppl 2):S1-S39.
29. Macedo P, Saleh H, Torrego A, Arbery J, MacKay I, Durham SR, et al. Postnasal drip and chronic cough: an open interventional study. Respir Med. 2009;103(11):1700-1705.
30. Asilsoy S, Bayram E, Agin H, Apa H, Can D, Gulle S, et al. Evaluation of chronic cough in children. Chest. 2008;134(6):1122-1128.
31. Morice AH, Millqvist E, Bieksiene K, Birring SS, Dicpinigaitis P, Ribas CD, et al. ERS guidelines on the diagnosis and treatment of chronic cough in adults and children. European Respir J. 2020; 55(1):1901136.
32. Kato S. Effects of erythromycin combined with Kakkon-to-ka-senkyu-shinn’I against chronic lower respiratory infection of the inflammatory sinusitis. Kampo and Immuno-allergy. 1998;12:140-149. [in Japanese]
33. Kimura M, Kimura I, Guo X, Luo B, Kobayashi S. Combined effects of Japanese-Sino medicine ‘Kakkon-to-ka-senkyu-shin’i’ and its related combinations and component drugs on adjuvant-induced inflammation in mice. Phytother Res. 1992;6(4):209-216.
34. Yamagiwa M. The immediate effect of Kakkon-to-ka-senkyu-shin’i (Ge-gen-tang-jia-chuan-xiong-xin-yi) on nasal obstruction evaluated by acoustic rhinometry. Kampo Med. 1995;46:83-89. [in Japanese]
35. Fujimura M, Abo M, Ogawa H, Nishi K, Kibe Y, Hirose T, et al. Importance of atopic cough, cough variant asthma and sinobronchial syndrome as causes of chronic cough in the Hokuriku area of Japan. Respirology. 2005;10(2):201-207.
36. Fujimura M, Ogawa H, Nishizawa Y, Nishi K. Comparison of atopic cough with cough variant asthma: is atopic cough a precursor of asthma? Thorax. 2003;58(1):14-18.
37. Kita T, Fujimura M, Ogawa H, Nakatsumi Y, Nomura S, Ishiura Y, et al. Antitussive effects of the leukotriene receptor antagonist montelukast in patients with cough variant asthma and atopic cough. Allergol Int. 2010;59(2):185-192.
38. McGarvey L, Morice AH. Atopic cough: little evidence to support a new clinical entity. Thorax. 2003;58(8):736-738.
39. Haapaniemi J, Laurikainen E. Ultrasound and antral lavage in the examination of maxillary sinuses. Rhinology. 2001;39(1):39-42.
40. Varonen H, Mäkelä M, Savolainen S, Läärä E, Hilden J. Comparison of ultrasound, radiography, and clinical examination in the diagnosis of acute maxillary sinusitis: a systematic review. J Clin Epidemiol. 2000;53(9):940-948.