Reply to the letter regarding “early dual drainage combining transpapillary endotherapy and percutaneous catheter drainage in patients with pancreatic fistula associated with severe acute pancreatitis”

[...]we performed the optimal intervention early according to the coexisting pathogenesis (not morphologic PC type), i.e., PCD and transpapillary drainage for infectious necrosis and PD disruption, respectively [2] (Fig. 1). [...]we used naso-pancreatic drainage (NPD), not a pancreatic stent (PS), as the primary PD drainage because of its efficiency and safety [2]. [...]the single route drainage may be blocked by tissue necrosis in infectious WON. [...]the long-term (median of 304 days) of an indwelling PS...