Ectopic Overexpression of Sonic Hedgehog (Shh) Induces Stromal Expansion and Metaplasia in the Adult Murine Pancreas Tekijä Volker Fendrich, Edwin Oh, Seungmin Bang, Collins Karikari, Niki Ottenhof, Savita Bisht, Matthias Lauth, Peter Brossart, Nicholas Katsanis, Anirban Maitra, Georg Feldmann