MUC1 and keratoconus: The pattern of Muc1 expression in iKC and KC models, and in human PDAC tissues (Andrianifahanana et al., 2001; Kaur et al., 2013; Rachagani et al., 2012b; Tsutsumida et al., 2006; Westgaard et al., 2009; Yonezawa et al., 2010) suggests Muc1 is expressed throughout the pancreas irrespective of the cell type from which PDAC originates.