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.
Wolowacz SE, Khan SB. The New National Institute of Health and Clinical Excellence (NICE) Single Technology Appraisal (STA) process: experience from the first completed appraisals. Ispor Connections. 2007;13(2):12-5.