1. Zuberbier T, Aberer W, Asero R, Abdul Latiff AH, Baker D, Ballmer-Weber B, Bernstein JA, Bindslev-Jensen C, Brzoza Z, Buense Bedrikow R, Canonica GW, Church MK, Craig T, Danilycheva IV, Dressler C, Ensina LF, Gimenez-Arnau A, Godse K, Gonçalo M, Grattan C, Hebert J, Hide M, Kaplan A, Kapp A, Katelaris CH, Kocaturk E, Kulthanan K, Larenas-Linnemann D, Leslie TA, Magerl M, Mathelier-Fusade P, Meshkova RY, Metz M, Nast A, Nettis E, Oude-Elberink H, Rosumeck S, Saini SS, Sanchez-Borges M, Schmid-Grendelmeier P, Staubach P, Sussman G, Toubi E, Vena GA, Vestergaard C, Wedi B, Werner RN, Zhao Z, Maurer M. Endorsed by the following societies: AAAAI, AAD, AAIITO, ACAAI, AEDV, APAAACI, ASBAI, ASCIA, BAD, BSACI, CDA, CMICA, CSACI, DDG, DDS, DGAKI, DSA, DST, EAACI, EIAS, EDF, EMBRN, ESCD, GA
2LEN, IAACI, IADVL, JDA, NVvA, MSAI, ÖGDV, PSA, RAACI, SBD, SFD, SGAI, SGDV, SIAAIC, SIDeMaST, SPDV, TSD, UNBB, UNEV and WAO. The EAACI/GA
2LEN/EDF/WAO guideline for the definition, classification, diagnosis and management of urticaria. Allergy 2018;73:1393-1414.
4. Lee SJ, Ha EK, Jee HM, Lee KS, Lee SW, Kim MA, Kim DH, Jung YH, Sheen YH, Sung MS, Han MY. Prevalence and risk factors of urticaria with a focus on chronic urticaria in children. Allergy Asthma Immunol Res 2017;9:212-219.
5. Kim YS, Park SH, Han K, Lee JH, Kim NI, Roh JY, Seo SJ, Song HJ, Lee MG, Choi JH, Park YM. Clinical course of chronic spontaneous urticaria in the Korean adult population. Allergy Asthma Immunol Res 2018;10:83-87.
6. Jacques P, Lavoie A, Bédard PM, Brunet C, Hebert J. Chronic idiopathic urticaria: profiles of skin mast cell histamine release during active disease and remission. J Allergy Clin Immunol 1992;89:1139-1143.
7. Chang TW, Chen C, Lin CJ, Metz M, Church MK, Maurer M. The potential pharmacologic mechanisms of omalizumab in patients with chronic spontaneous urticaria. J Allergy Clin Immunol 2015;135:337-342.
8. Kowalski ML, Woessner K, Sanak M. Approaches to the diagnosis and management of patients with a history of nonsteroidal anti-inflammatory drug-related urticaria and angioedema. J Allergy Clin Immunol 2015;136:245-251.
9. Shakouri A, Compalati E, Lang DM, Khan DA. Effectiveness of Helicobacter pylori eradication in chronic urticaria: evidence-based analysis using the Grading of Recommendations Assessment, Development, and Evaluation system. Curr Opin Allergy Clin Immunol 2010;10:362-369.
10. Varghese R, Rajappa M, Chandrashekar L, Kattimani S, Archana M, Munisamy M, Revathy G, Thappa DM. Association among stress, hypocortisolism, systemic inflammation, and disease severity in chronic urticaria. Ann Allergy Asthma Immunol 2016;116:344-348.
11. Grattan CE, Francis DM, Slater NG, Barlow RJ, Greaves MW. Plasmapheresis for severe, unremitting, chronic urticaria. Lancet 1992;339:1078-1080.
13. Curto-Barredo L, Silvestre JF, Gimenez-Arnau AM. Update on the treatment of chronic urticaria. Actas Dermosifiliogr 2014;105:469-482.
14. Bernstein JA, Lang DM, Khan DA, Craig T, Dreyfus D, Hsieh F, Sheikh J, Weldon D, Zuraw B, Bernstein DI, Blessing-Moore J, Cox L, Nicklas RA, Oppenheimer J, Portnoy JM, Randolph CR, Schuller DE, Spector SL, Tilles SA, Wallace D. The diagnosis and management of acute and chronic urticaria: 2014 update. J Allergy Clin Immunol 2014;133:1270-1277.
15. Beck LA, Bernstein JA, Maurer M. A review of international recommendations for the diagnosis and management of chronic urticaria. Acta Derm Venereol 2017;97:149-158.
16. Kapp A, Pichler WJ. Levocetirizine is an effective treatment in patients suffering from chronic idiopathic urticaria: a randomized, double-blind, placebo-controlled, parallel, multicenter study. Int J Dermatol 2006;45:469-474.
17. Grob JJ, Auquier P, Dreyfus I, Ortonne JP. How to prescribe antihistamines for chronic idiopathic urticaria: desloratadine daily vs PRN and quality of life. Allergy 2009;64:605-612.
19. Simons FE, Sussman GL, Simons KJ. Effect of the H2-antagonist cimetidine on the pharmacokinetics and pharmacodynamics of the H1-antagonists hydroxyzine and cetirizine in patients with chronic urticaria. J Allergy Clin Immunol 1995;95:685-693.
21. Asero R, Tedeschi A. Usefulness of a short course of oral prednisone in antihistamine-resistant chronic urticaria: a retrospective analysis. J Investig Allergol Clin Immunol 2010;20:386-390.
22. Kim S, Baek S, Shin B, Yoon SY, Park SY, Lee T, Lee YS, Bae YJ, Kwon HS, Cho YS, Moon HB, Kim TB. Influence of initial treatment modality on long-term control of chronic idiopathic urticaria. PLoS One 2013;8:e69345.
23. de Silva NL, Damayanthi H, Rajapakse AC, Rodrigo C, Rajapakse S. Leukotriene receptor antagonists for chronic urticaria: a systematic review. Allergy Asthma Clin Immunol 2014;10:24.
24. Bagenstose SE, Levin L, Bernstein JA. The addition of zafirlukast to cetirizine improves the treatment of chronic urticaria in patients with positive autologous serum skin test results. J Allergy Clin Immunol 2004;113:134-140.
25. Vena GA, Cassano N, Colombo D, Peruzzi E, Pigatto P. Neo-I-30 Study Group. Cyclosporine in chronic idiopathic urticaria: a double-blind, randomized, placebo-controlled trial. J Am Acad Dermatol 2006;55:705-709.
26. Sagi L, Solomon M, Baum S, Lyakhovitsky A, Trau H, Barzilai A. Evidence for methotrexate as a useful treatment for steroid-dependent chronic urticaria. Acta Derm Venereol 2011;91:303-306.
27. Sharma VK, Singh S, Ramam M, Kumawat M, Kumar R. A randomized placebo-controlled double-blind pilot study of methotrexate in the treatment of H1 antihistamine-resistant chronic spontaneous urticaria. Indian J Dermatol Venereol Leprol 2014;80:122-128.
28. Zimmerman AB, Berger EM, Elmariah SB, Soter NA. The use of mycophenolate mofetil for the treatment of autoimmune and chronic idiopathic urticaria: experience in 19 patients. J Am Acad Dermatol 2012;66:767-770.
30. Asero R. Oral cyclophosphamide in a case of cyclosporin and steroid-resistant chronic urticaria showing autoreactivity on autologous serum skin testing. Clin Exp Dermatol 2005;30:582-583.
31. Maurer M, Rosén K, Hsieh HJ, Saini S, Grattan C, Gimenez-Arnau A, Agarwal S, Doyle R, Canvin J, Kaplan A, Casale T. Omalizumab for the treatment of chronic idiopathic or spontaneous urticaria. N Engl J Med 2013;368:924-935.
32. Kaplan A, Ledford D, Ashby M, Canvin J, Zazzali JL, Conner E, Veith J, Kamath N, Staubach P, Jakob T, Stirling RG, Kuna P, Berger W, Maurer M, Rosen K. Omalizumab in patients with symptomatic chronic idiopathic/spontaneous urticaria despite standard combination therapy. J Allergy Clin Immunol 2013;132:101-109.
33. Kaplan A, Ferrer M, Bernstein JA, Antonova E, Trzaskoma B, Raimundo K, Rosen K, Omachi TA, Khalil S, Zazzali JL. Timing and duration of omalizumab response in patients with chronic idiopathic/spontaneous urticaria. J Allergy Clin Immunol 2016;137:474-481.
34. Hide M, Park HS, Igarashi A, Ye YM, Kim TB, Yagami A, Roh J, Lee JH, Chinuki Y, Youn SW, Lee SK, Inomata N, Choi JH, Fukunaga A, Wang J, Matsushima S, Greenberg S, Khalil S. Efficacy and safety of omalizumab in Japanese and Korean patients with refractory chronic spontaneous urticaria. J Dermatol Sci 2017;87:70-78.
35. Tharp MD, Bernstein JA, Kavati A, Ortiz B, MacDonald K, Denhaerynck K, Abraham I, Lee CS. Benefits and harms of omalizumab treatment in adolescent and adult patients with chronic idiopathic (spontaneous) urticaria: a meta-analysis of “real-world” evidence. JAMA Dermatol 2018;11. 14. [Epub]. 10.1001/jamadermatol.2018.3447.
36. Engin B, Ozdemir M. Prospective randomized non-blinded clinical trial on the use of dapsone plus antihistamine vs. antihistamine in patients with chronic idiopathic urticaria. J Eur Acad Dermatol Venereol 2008;22:481-486.
37. Orden RA, Timble H, Saini SS. Efficacy and safety of sulfasalazine in patients with chronic idiopathic urticaria. Ann Allergy Asthma Immunol 2014;112:64-70.
38. Marmor MF, Kellner U, Lai TY, Lyons JS, Mieler WF. American Academy of Ophthalmology. Revised recommendations on screening for chloroquine and hydroxychloroquine retinopathy. Ophthalmology 2011;118:415-422.
39. Pho LN, Eliason MJ, Regruto M, Hull CM, Powell DL. Treatment of chronic urticaria with colchicine. J Drugs Dermatol 2011;10:1423-1428.
41. Antia C, Baquerizo K, Korman A, Alikhan A, Bernstein JA. Urticaria: a comprehensive review: treatment of chronic urticaria, special populations, and disease outcomes. J Am Acad Dermatol 2018;79:617-633.
42. Kar S, Krishnan A, Preetha K, Mohankar A. A review of antihistamines used during pregnancy. J Pharmacol Pharmacother 2012;3:105-108.