References
- Sackett D. L., Whelan G. Cancer risk in ulcerative colitis: Scientific requirements for the study of prognosis. Gastroenterology 1980; 78: 1632–5
- Kokmen E., Ozsarfati Y., Beard C. M., O'Brien P. C., Rocca W. A. Impact of referral bias on clinical and epidemiological studies of Alzheimer's disease. J Clin Epidemiol 1996; 49: 79–83
- Ellenberg J. H., Nelson K. B. Sample selection and the natural history of disease. Studies of febrile seizures. JAMA 1980; 243: 1337–40
- Stern R. S., Nijsten T., Feldman S. R., Margolis D. J., Rolstad T. Psoriasis is common, carries a substantial burden even when not extensive, and is associated with widespread treatment dissatisfaction. J Investig Dermatol Symp Proc 2004; 9: 136–9
- Haldeman S., Carey P., Townsend M., Papadopoulos C. Clinical perceptions of the risk of vertebral artery dissection after cervical manipulation: The effect of referral bias. Spine J 2002; 2: 334–42
- Lindgren S., Groth O. Generalized pustular psoriasis. A report on thirteen patients. Acta Derm Venereol 1976; 56: 139–47
- Pearce D. J., Lucas J., Wood B., Chen J., Balkrishnan R., Feldman S. R. Death from psoriasis: Representative US data. J Dermatolog Treat 2006; 17: 302–3
- Fleischer A. B Jr., Clark A. R., Rapp S. R., Reboussin D. M., Feldman S. R. Commercial tanning bed treatment is an effective psoriasis treatment: Results from an uncontrolled clinical trial. J Invest Dermatol 1997; 109: 170–4
- Carlin C. S., Callis K. P., Krueger G. G. Efficacy of acitretin and commercial tanning bed therapy for psoriasis. Arch Dermatol 2003; 139: 436–42
- Fleischer A. B Jr., Feldman S. R., Rapp S. R., Reboussin D. M., Exum M. L., Clark A. R. Alternative therapies commonly used within a population of patients with psoriasis. Cutis 1996; 58: 216–20