P.16.7 WIRELESS CAPSULE ENDOSCOPY FOR THE DIAGNOSIS OF OBSCURE GASTROINTESTINAL BLEEDING IN VON WILLEBRAND DISEASE: A RETROSPECTIVE CASE SERIES. (24th February 2016) - Ferretti, F.; Branchi, F.; Tomba, C.; Conte, D.; Siboni, S.M.; Biguzzi, E.; Elli, L.