For example, AIP cells expressed SLC22A11 or SLC22A12, or both of them, but did not show expression of SLC22A6, SLC22A7, or SLC22A8. It is noted that the positivity of AI transporter(s) in AIP cells was defined as having the expression of at least one AI transporter (Additional file 1: Fig. S2A), and the positivity of BI transporter(s) in BIP cells was defined as the presence of at least one BI transporter (Additional file 1: Fig. S2B). The gene discussed is SLC22A12; the disease is autoimmune pancreatitis.