Erythroid disturbances before and after treatment of Portuguese psoriasis vulgaris patients: A cross-sectional and longitudinal study - Coimbra, S.; Oliveira, H.; Reis, F.; Belo, L.; Rocha, S.; Quintanilha, A.; Figueiredo, A.; Teixeira, F.; Castro, E.; Rocha-Pereira, P.; Santos-Silva, A. (American Journal of Clinical Dermatology, 2012)