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Hussein, M., M. Ellawindi, and G. Ragab, "Performance of classification criteria for Behcet's disease in an Egyptian cohort", Indian Journal of Rheumatology, vol. 12, issue 3: Medknow Publications, pp. 152 - 155, 2017. Abstracthttps://scholar.google.com.eg/citations?hl=en&user=7L5p7RYAAAAJ
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Goubran, H., J. Seghatchian, W. Sabry, G. Ragab, and T. Burnouf, "Platelet and extracellular vesicles in COVID-19 infection and its vaccines", Transfusion and Apheresis Science, vol. 61, issue 3: Elsevier Ltd, 2022. Abstracthttps://scholar.google.com.eg/citations?hl=en&user=7L5p7RYAAAAJ
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Goubran, H., G. Ragab, and S. Hassouna, Precision Anticoagulation Medicine: A Practical Guide, : Springer Nature, 2019. Abstract
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Fayed, A., M. T. Hegazy, L. Biard, M. Vieira, T. El Shabony, D. Saadoun, M. Casato, M. Visentini, G. Ragab, and P. Cacoub, "Relapse of Hepatitis C Virus Cryoglobulinemic Vasculitis after Sustained Viral Response after Interferon-Free Direct-Acting Antivirals", American Journal of Gastroenterology, vol. 117, issue 4: Wolters Kluwer Health, pp. 627 - 636, 2022. Abstracthttps://scholar.google.com.eg/citations?hl=en&user=7L5p7RYAAAAJ
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Hegazy, M. T., A. Fayed, T. El Shabony, M. Visentini, D. Saadoun, P. Cacoub, and G. Ragab, "Relapsing Cryoglobulinemic Vasculitis Following Successful HCV Eradication by Interferon-Free Direct Acting Antivirals, an International Multicenter Study", ARTHRITIS & RHEUMATOLOGY, vol. 71: WILEY 111 RIVER ST, HOBOKEN 07030-5774, NJ USA, 2019. Abstract
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De Vita, S., L. Quartuccio, M. Isola, L. Corazza, M. Ramos-Casals, S. Retamozo, G. Ragab, N. Zoheir, M. M. El Menyawi, M. Salem, et al., "RESULTS OF THE CLASSIFICATION CRITERIA FOR CRYOGLOBULINEMIC VASCULITIS VALIDATION STUDY", ANNALS OF THE RHEUMATIC DISEASES, vol. 72: BMJ PUBLISHING GROUP BRITISH MED ASSOC HOUSE, TAVISTOCK SQUARE, LONDON WC1H 9JR, ENGLAND, pp. 640–641, 2013. Abstract
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Al Saleh, J., G. Ragab, P. Nash, H. Halabi, A. Laatar, A. M. El-Sayed Yousef, H. Ehsouna, and M. Hammoudeh, "Rheumatoid arthritis in the Middle East and Africa: are we any closer to optimising its management?", Clinical rheumatology, vol. 34, issue 1, pp. 1-8, 2015 Jan. Abstract
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Al Saleh, J., G. Ragab, P. Nash, H. Halabi, A. Laatar, A. E. - S. M. Yousef, H. Ehsouna, and M. Hammoudeh, Rheumatoid arthritis in the Middle East and Africa: are we any closer to optimising its management?, : Springer London, 2015. Abstract
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Al Saleh, J., G. Ragab, P. Nash, H. Halabi, A. Laatar, A. M. El-Sayed Yousef, H. Ehsouna, and M. Hammoudeh, "Rheumatoid arthritis in the Middle East and Africa: are we any closer to optimising its management?", Clinical Rheumatology, vol. 34, issue 1: Springer London, 2015. Abstracthttps://scholar.google.com.eg/citations?hl=en&user=7L5p7RYAAAAJ
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Treppo, E., L. Quartuccio, G. Ragab, and S. De Vita, "Rheumatologic manifestations of Hepatitis C Virus", Minerva Medica, vol. 112, issue 2: Edizioni Minerva Medica, pp. 201 - 214, 2021. Abstracthttps://scholar.google.com.eg/citations?hl=en&user=7L5p7RYAAAAJ
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Treppo, E., L. Quartuccio, G. Ragab, and S. De Vita, "Rheumatologic manifestations of Hepatitis C Virus.", Minerva Medica, 2020. Abstract
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Goubran, H., J. Stakiw, J. Seghatchian, G. Ragab, and T. Burnouf, "SARS-CoV-2 and cancer: The intriguing and informative cross-talk", Transfusion and Apheresis Science: Elsevier Ltd, 2022. Abstracthttps://scholar.google.com.eg/citations?hl=en&user=7L5p7RYAAAAJ
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De Vita, S., L. Quartuccio, M. Isola, L. Corazza, M. Ramos-Casals, S. Retamozo, G. Ragab, N. Zoheir, M. M. El Menyawi, and M. Salem, "SAT0175 Results of the Classification Criteria for Cryoglobulinemic Vasculitis Validation Study", Annals of the Rheumatic Diseases, vol. 72, issue Suppl 3: BMJ Publishing Group Ltd, pp. A640-A641, 2013. Abstract
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Ragab, G., and H. Rizk, "Subacute Bacterial Endocarditis", The Microbiome in Rheumatic Diseases and Infection: Springer, 2018.
Ragab, G., and H. Rizk, "Subacute Bacterial Endocarditis", The Microbiome in Rheumatic Diseases and Infection: Springer, pp. 391-401, 2018. Abstract
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Ragab, G., and H. Rizk, "Subacute bacterial endocarditis", The Microbiome in Rheumatic Diseases and Infection: Springer International Publishing, pp. 391 - 401, 2018. Abstract
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Ragab, G., C. Dehner, H. Hamza, and M. Kriegel, "Systemic Lupus Erythematosus", The Microbiome in Rheumatic Diseases and Infection: Springer, 2018.
Ragab, G., C. Dehner, H. Hamza, and M. Kriegel, "Systemic Lupus Erythematosus", The Microbiome in Rheumatic Diseases and Infection: Springer, pp. 285-304, 2018. Abstract
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Ragab, G., C. Dehner, H. Hamza, and M. Kriegel, "Systemic lupus erythematosus", The Microbiome in Rheumatic Diseases and Infection: Springer International Publishing, pp. 285 - 304, 2018. Abstract
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Ragab, G., M. T. Hegazy, M. Ali, M. R. E. Abdel-Halim, and X. Puéchal, "Three Patterns of Cutaneous Involvement in Granulomatosis with Polyangiitis", Journal of Advanced Research, vol. 24: Elsevier, pp. 311-315, 2020. Abstract
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Ragab, G., M. T. Hegazy, M. Ali, M. R. E. Abdel-Halim, and X. Puéchal, "Three Patterns of Cutaneous Involvement in Granulomatosis with Polyangiitis", Journal of Advanced Research, vol. 24: Elsevier B.V., pp. 311 - 315, 2020. Abstracthttps://scholar.google.com.eg/citations?hl=en&user=7L5p7RYAAAAJ
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Hegazy, M. T., M. A. Hussein, L. Quartuccio, M. Fawzy, N. Zoheir, M. I. Ellawindi, M. Bond, C. Mazzaro, A. E. Ray, and M. E. S. El Raziky, "Treatment of cryoglobulinemic vasculitis with sofosbuvir in four combination protocols", ARTHRITIS & RHEUMATOLOGY, vol. 68: WILEY 111 RIVER ST, HOBOKEN 07030-5774, NJ USA, 2016. Abstract
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Elbendary, A., M. R. E. Abdel-Halim, and G. Ragab, "Updates in cutaneous manifestations of systemic vasculitis", Current opinion in rheumatology, vol. 34, issue 1: NLM (Medline), pp. 25 - 32, 2022. Abstracthttps://scholar.google.com.eg/citations?hl=en&user=7L5p7RYAAAAJ
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Quartuccio, L., M. Isola, L. Corazza, M. Ramos-Casals, S. Retamozo, G. M. Ragab, M. N. Zoheir, M. A. - M. El-Menyawi, M. N. Salem, and D. Sansonno, "Validation of the classification criteria for cryoglobulinaemic vasculitis", Rheumatology, vol. 53, issue 12: Oxford University Press, pp. 2209-2213, 2014. Abstract
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Quartuccio, L., M. Isola, L. Corazza, M. Ramos-Casals, S. Retamozo, G. M. Ragab, M. Naguib Zoheir, M. - M. El-Menyawi, M. N. Salem, D. Sansonno, et al., "Validation of the classification criteria for cryoglobulinaemic vasculitis", Rheumatology (United Kingdom), vol. 53, issue 12: Oxford University Press, pp. 2209 - 2213, 2014. Abstracthttps://scholar.google.com.eg/citations?hl=en&user=7L5p7RYAAAAJ
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Quartuccio, L., M. Isola, L. Corazza, M. Ramos-Casals, S. Retamozo, G. M. Ragab, M. N. Zoheir, M. A. - M. El-Menyawi, M. N. Salem, D. Sansonno, et al., "Validation of the classification criteria for cryoglobulinaemic vasculitis.", Rheumatology (Oxford, England), vol. 53, issue 12, pp. 2209-13, 2014 Dec. Abstract

OBJECTIVE: The aim of this study was to validate the classification criteria for cryoglobulinaemic vasculitis (CV).

METHODS: Twenty-three centres were involved. New patients with CV (group A) and controls, i.e. subjects with serum cryoglobulins but lacking CV based on the gold standard of clinical judgment (group B) and subjects without cryoglobulins but with clinical features that can be observed in the course of CV (group C), were studied. Positivity of serum cryoglobulins was necessary for CV classification. Sensitivity and specificity of the criteria were calculated by comparing group A vs group B. The group A vs group C comparison was done to demonstrate the possible diagnostic utility of the criteria.

RESULTS: The study included 268 patients in group A, 182 controls in group B and 193 controls in group C (small vessel vasculitis, 51.8%). The questionnaire (at least 2/3 positive answers) showed 89.0% sensitivity and 93.4% specificity; the clinical item (at least 3/4 clinical involvement) showed 75.7% sensitivity and 89.0% specificity and the laboratory item (at least 2/3 laboratory data) showed 80.2% sensitivity and 62.4% specificity. The sensitivity and specificity of the classification criteria (at least 2/3 positive items) were 89.9% and 93.5%, respectively. The comparison of group A with group C demonstrated the clinical utility of the criteria in differentiating CV from CV mimickers.

CONCLUSION: Classification criteria for CV were validated in a second, large, international study confirming good sensitivity and specificity in a complex systemic disease.

Quartuccio, L., M. Isola, L. Corazza, S. Retamozo, M. A. - M. El-Menyawi, E. Gremese, M. Sebastiani, N. Pipitone, T. Urraro, V. Conteduca, et al., "Validation Study Of The International Classification Criteria For The Cryoglobulinemic Vasculitis", ARTHRITIS AND RHEUMATISM, vol. 65, pp. S1123–S1124, 2013. Abstract
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Luca, Q., I. Miriam, C. Laura, R. Soledad, M. A. M. El Menyawi, G. Elisa, M. Sebastiani, P. Nicolo, U. Teresa, and C. Vincenza, "Validation Study Of The International Classification Criteria For The Cryoglobulinemic Vasculitis", ACR 2013 ANNUAL MEETING, vol. 65, pp. S1123-S1124, 2013. Abstract
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Ragab, G., "Vasculitic manifestations in the gastrointestinal tract", Oxford Textbook of Vasculitis: Oxford University Press, 2014.
Ragab, G., "Vasculitic manifestations in the gastrointestinal tract", Oxford Textbook of Vasculitis: Oxford University Press, pp. 179-195, 2014. Abstract
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Ragab, G., and M. A. Hussein, "Vasculitic syndromes in hepatitis C virus: A review", Journal of Advanced Research, vol. 8, no. 2, pp. 99 - 111, 2017. Abstracthttps://scholar.google.com.eg/citations?hl=en&user=7L5p7RYAAAAJ
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Ragab, G., and M. A. Hussein, "Vasculitic syndromes in hepatitis C virus: A review", Journal of advanced research, vol. 8, issue 2: Elsevier, pp. 99-111, 2017. Abstract
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Ragab, G., and M. A. Hussein, "Vasculitic syndromes in hepatitis C virus: A review", Journal of Advanced Research, vol. 8, issue 2: Elsevier B.V., pp. 99 - 111, 2017. Abstracthttps://scholar.google.com.eg/citations?hl=en&user=7L5p7RYAAAAJ
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