Bollywood megastar Amitabh Bachchan unveiled a Mobile Diabetes Van by Seven Hills Hospital on his 70th birthday, in Mumbai. As always, Amitabh Bachchan made sure he kept his fans updated and wrote on Twitter: Inaugurated 'Amitabh' the mobile diabetes unit from Silver Star, the noble charitable organisation that I patronize, in Mumbai .. Free diabetes tests conducted by these mobile units .. proud to be associated with it in patron, and to contribute for its extension.