References
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- http://www.dermatology.ca/patients_public/info_patients/psoriasis/index.html
- 2. Schäfer T. Epidemiology of Psoriasis; Review and the German Perspective. Dermatology. 2006; 212:327-337.
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- http://www.ifpa-pso.org/t2.aspx?p=107478.
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- http://www.cks.nhs.uk/patient_information_leaflet/psoriasis/symptoms
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