Lock AD, Allen AR, Fleming AD, Goatman KA. The effect of watermarking on automated assessment of diabetic retinal images. IEEE T Inf Technol B. 2012 Jan 1.
Urrutia I, Aguirre U, Sunyer J, Plana E, Muniozguren N, Martinez-Moratalla J. Changes in the prevalence of asthma in the Spanish cohort of the European Community Respiratory Health Survey (ECRHS-II). Arch. Bronconeumol. 2007 Aug;43(8):425-30.