1. Song WJ, Morice AH. Cough hypersensitivity syndrome: a few more steps forward. Allergy Asthma Immunol Res. 2017; 9:394–402.
Article
2. Morice AH. Epidemiology of cough. Pulm Pharmacol Ther. 2002; 15:253–259.
Article
3. Cho SH, Lin HC, Ghoshal AG, Bin Abdul Muttalif AR, Thanaviratananich S, Bagga S, et al. Respiratory disease in the Asia-Pacific region: cough as a key symptom. Allergy Asthma Proc. 2016; 37:131–140.
Article
4. Song WJ, Chang YS, Faruqi S, Kim JY, Kang MG, Kim S, et al. The global epidemiology of chronic cough in adults: a systematic review and meta-analysis. Eur Respir J. 2015; 45:1479–1481.
Article
5. French CL, Irwin RS, Curley FJ, Krikorian CJ. Impact of chronic cough on quality of life. Arch Intern Med. 1998; 158:1657–1661.
Article
6. Morice AH, Fontana GA, Sovijarvi AR, Pistolesi M, Chung KF, Widdicombe J, et al. The diagnosis and management of chronic cough. Eur Respir J. 2004; 24:481–492.
Article
7. Vertigan AE, Haines J, Slovarp L. An update on speech pathology management of chronic refractory cough. J Allergy Clin Immunol Pract. 2019; 7:1756–1761.
Article
8. Ryan NM, Vertigan AE, Birring SS. An update and systematic review on drug therapies for the treatment of refractory chronic cough. Expert Opin Pharmacother. 2018; 19:687–711.
Article
9. 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; 153:196–209.
10. Kwon NH, Oh MJ, Min TH, Lee BJ, Choi DC. Causes and clinical features of subacute cough. Chest. 2006; 129:1142–1147.
Article
11. Brightling CE, Ward R, Goh KL, Wardlaw AJ, Pavord ID. Eosinophilic bronchitis is an important cause of chronic cough. Am J Respir Crit Care Med. 1999; 160:406–410.
Article
12. Crapo RO, Casaburi R, Coates AL, Enright PL, Hankinson JL, Irvin CG, et al. Guidelines for methacholine and exercise challenge testing-1999. This official statement of the American Thoracic Society was adopted by the ATS board of directors, July 1999. Am J Respir Crit Care Med. 2000; 161:309–329.
13. Djukanović R, Sterk PJ, Fahy JV, Hargreave FE. Standardised methodology of sputum induction and processing. Eur Respir J Suppl. 2002; 37:1s–2s.
14. Song DJ, Song WJ, Kwon JW, Kim GW, Kim MA, Kim MY, et al. KAAACI evidence-based clinical practice guidelines for chronic cough in adults and children in Korea. Allergy Asthma Immunol Res. 2018; 10:591–613.
Article
15. Johnstone KJ, Chang AB, Fong KM, Bowman RV, Yang IA. Inhaled corticosteroids for subacute and chronic cough in adults. Cochrane Database Syst Rev. 2013; CD009305.
Article
16. 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; 129:1S–23S.
17. Moher D, Liberati A, Tetzlaff J, Altman DG. PRISMA Group. Preferred reporting items for systematic reviews and meta-analyses: the PRISMA statement. BMJ. 2009; 339:b2535.
Article
18. Glanville JM, Lefebvre C, Miles JN, Camosso-Stefinovic J. How to identify randomized controlled trials in MEDLINE: ten years on. J Med Libr Assoc. 2006; 94:130–136.
19. Higgins JP, Altman DG, Gøtzsche PC, Jüni P, Moher D, Oxman AD, et al. The Cochrane Collaboration's tool for assessing risk of bias in randomised trials. BMJ. 2011; 343:d5928.
Article
20. Higgins JPT, Green S. Cochrane handbook for systematic reviews of interventions. Hoboken, NJ: Wiley;2008.
21. Cohen J. Statistical power analysis for the behavioral sciences. 2nd ed. Abingdon: Routledge;2013.
22. Boulet LP, Milot J, Boutet M, St Georges F, Laviolette M. Airway inflammation in nonasthmatic subjects with chronic cough. Am J Respir Crit Care Med. 1994; 149:482–489.
Article
23. Pizzichini MM, Pizzichini E, Parameswaran K, Clelland L, Efthimiadis A, Dolovich J, et al. Nonasthmatic chronic cough: no effect of treatment with an inhaled corticosteroid in patients without sputum eosinophilia. Can Respir J. 1999; 6:323–330.
24. Rytilä P, Ghaly L, Varghese S, Chung W, Selroos O, Haahtela T, et al. Treatment with inhaled steroids in patients with symptoms suggestive of asthma but with normal lung function. Eur Respir J. 2008; 32:989–996.
25. Pornsuriyasak P, Charoenpan P, Vongvivat K, Thakkinstian A. Inhaled corticosteroid for persistent cough following upper respiratory tract infection. Respirology. 2005; 10:520–524.
Article
26. Ponsioen BP, Hop WC, Vermue NA, Dekhuijzen PN, Bohnen AM. Efficacy of fluticasone on cough: a randomised controlled trial. Eur Respir J. 2005; 25:147–152.
Article
27. Price DB, Buhl R, Chan A, Freeman D, Gardener E, Godley C, et al. Fractional exhaled nitric oxide as a predictor of response to inhaled corticosteroids in patients with non-specific respiratory symptoms and insignificant bronchodilator reversibility: a randomised controlled trial. Lancet Respir Med. 2018; 6:29–39.
Article
28. Ribeiro M, Pereira CA, Nery LE, Beppu OS, Silva CO. High-dose inhaled beclomethasone treatment in patients with chronic cough: a randomized placebo-controlled study. Ann Allergy Asthma Immunol. 2007; 99:61–68.
Article
29. Gillissen A, Richter A, Oster H. Clinical efficacy of short-term treatment with extra-fine HFA beclomethasone dipropionate in patients with post-infectious persistent cough. J Physiol Pharmacol. 2007; 58 Suppl 5:223–232.
30. Engel T, Heinig JH, Madsen O, Hansen M, Weeke ER. A trial of inhaled budesonide on airway responsiveness in smokers with chronic bronchitis. Eur Respir J. 1989; 2:935–939.
31. Chaudhuri R, McMahon AD, Thomson LJ, MacLeod KJ, McSharry CP, Livingston E, et al. Effect of inhaled corticosteroids on symptom severity and sputum mediator levels in chronic persistent cough. J Allergy Clin Immunol. 2004; 113:1063–1070.
Article
32. Wesseling GJ, Quaedvlieg M, Wouters EF. Inhaled budesonide in chronic bronchitis. Effects on respiratory impedance. Eur Respir J. 1991; 4:1101–1105.
33. Evald T, Munch EP, Kok-Jensen A. Chronic non-asthmatic cough is not affected by inhaled beclomethasone dipropionate. A controlled double blind clinical trial. Allergy. 1989; 44:510–514.
34. van Laarhoven AI, van der Sman-Mauriks IM, Donders AR, Pronk MC, van de Kerkhof PC, Evers AW. Placebo effects on itch: a meta-analysis of clinical trials of patients with dermatological conditions. J Invest Dermatol. 2015; 135:1234–1243.
Article
35. Häuser W, Sarzi-Puttini P, Tölle TR, Wolfe F. Placebo and nocebo responses in randomised controlled trials of drugs applying for approval for fibromyalgia syndrome treatment: systematic review and meta-analysis. Clin Exp Rheumatol. 2012; 30:78–87.
36. Miranda Varella Pereira G, Soriano Marcolino M, Silveira Nogueira Reis Z, Vale de Castro Monteiro M. A systematic review of drug treatment of vulvodynia: evidence of a strong placebo effect. BJOG. 2018; 125:1216–1224.
37. Vase L, Vollert J, Finnerup NB, Miao X, Atkinson G, Marshall S, et al. Predictors of the placebo analgesia response in randomized controlled trials of chronic pain: a meta-analysis of the individual data from nine industrially sponsored trials. Pain. 2015; 156:1795–1802.
38. Elsenbruch S, Enck P. Placebo effects and their determinants in gastrointestinal disorders. Nat Rev Gastroenterol Hepatol. 2015; 12:472–485.
Article
39. Eccles R. Importance of placebo effect in cough clinical trials. Lung. 2010; 188 Suppl 1:S53–S61.
Article
40. Gibson PG, Dolovich J, Denburg J, Ramsdale EH, Hargreave FE. Chronic cough: eosinophilic bronchitis without asthma. Lancet. 1989; 1:1346–1348.
Article
41. Agache I, Rogozea L. Asthma biomarkers: do they bring precision medicine closer to the clinic? Allergy Asthma Immunol Res. 2017; 9:466–476.
Article
42. Song WJ, Kim HJ, Shim JS, Won HK, Kang SY, Sohn KH, et al. Diagnostic accuracy of fractional exhaled nitric oxide measurement in predicting cough-variant asthma and eosinophilic bronchitis in adults with chronic cough: a systematic review and meta-analysis. J Allergy Clin Immunol. 2017; 140:701–709.
43. Smith AD, Cowan JO, Brassett KP, Filsell S, McLachlan C, Monti-Sheehan G, et al. Exhaled nitric oxide: a predictor of steroid response. Am J Respir Crit Care Med. 2005; 172:453–459.
44. Yi F, Chen R, Luo W, Xu D, Han L, Liu B, et al. Validity of fractional exhaled nitric oxide in diagnosis of corticosteroid-responsive cough. Chest. 2016; 149:1042–1051.
Article
45. Inoue Y, Sato S, Manabe T, Makita E, Chiyotanda M, Takahashi K, et al. Measurement of exhaled nitric oxide in children: a comparison between NObreath® and NIOX VERO® analyzers. Allergy Asthma Immunol Res. 2018; 10:478–489.
46. Birring SS, Spinou A. How best to measure cough clinically. Curr Opin Pharmacol. 2015; 22:37–40.
Article