Furuya S, Naruse S, Ko SB, Ishiguro H, Yoshikawa T, Hayakawa T. Distribution of aquaporin 1 in the rat pancreatic duct system examined with light- and electron-microscopic immunohistochemistry. Cell Tissue Res. 2002 Apr;308(1):75–86. doi: 10.1007/s00441-002-0527-x. PMID: 12012207.