Safety and efficacy of cytology brushings versus standard fine-needle aspiration in evaluating cystic pancreatic lesions: a controlled study - Al-Haddad, M.; Gill, K. R. S.; Raimondo, M.; Woodward, T. A.; Krishna, M.; Crook, J. E.; Skarvinko, L. N.; Jamil, L. H.; Hasan, M.; Wallace, M. B. (Endoscopy, 2010)