ERBB2 and pancreatitis: As a first step to address this question, we characterized the ERBB2 expression pattern in wild-type (WT) mice and in mice expressing oncogenic KRASG12D in acinar cells (ElaCER KrasG12D mice), in the absence or in the presence of cerulein-induced pancreatitis (Fig. 1A,B and Supplementary Fig. S1).