Papadavid E, Vlami K, Dalamaga M, Giatrakou S, Theodoropoulos K, Gyftopoulos S, Stavrianeas N, Papiris S, Rigopoulos D. Sleep apnea as a comorbidity in obese psoriasis patients: a cross-sectional study. Do psoriasis characteristics and metabolic parameters play a role?. J Eur Acad Dermatol Venereol. 2013;27(7):820-6.