Title: Fishing line assisted endoscopic placement of multiple plastic biliary stents for
unresectable malignant hilar biliary obstruction: a retrospective study
Version: 0 Date: 22 Sep 2021
Reviewer's report:
The aim of this study was to evaluate the feasibility and efficiency of the fishing line assisted
(FLA) method for preventing the complication.
However, this manuscript has some issues that need to be addressed.
1) As the authors mentioned, straight biliary stents are easier to migrate during multiple plastic
biliary stents placement. However, single pig-tail stent or inside stent may have prevented stent
migration without FLA method.
2) The idea of using fishing line to prevent stent migration is interesting. However, the use of
fishing lines in endoscopic therapy may be ethically problematic.
3) Types and size of plastic stents used in this study are unclear.
4) Details of patients’ characteristics are unclear.
5) How did the author make the side hole at the distal end of the plastic stents?
6) It is difficult to understand the process of retrieving the fishing line from the first  plastic
biliary stent  in Video1.
7) Specific P-value should be presented in the Tables.
Title: Fishing line assisted endoscopic placement of multiple plastic biliary stents for
unresectable malignant hilar biliary obstruction: a retrospective study
Version: 0 Date: 22 Sep 2021
Reviewer's report:
The aim of this study was to evaluate the feasibility and efficiency of the fishing line assisted
(FLA) method for preventing the complication.
However, this manuscript has some issues that need to be addressed.
1) As the authors mentioned, straight biliary stents are easier to migrate during multiple plastic
biliary stents placement. However, single pig-tail stent or inside stent may have prevented stent
migration without FLA method.
2) The idea of using fishing line to prevent stent migration is interesting. However, the use of
fishing lines in endoscopic therapy may be ethically problematic.
3) Types and size of plastic stents used in this study are unclear.
4) Details of patients’ characteristics are unclear.
5) How did the author make the side hole at the distal end of the plastic stents?
6) It is difficult to understand the process of retrieving the fishing line from the first  plastic
biliary stent  in Video1.
7) Specific P-value should be presented in the Tables.
Please review this paper.
user
Title: Fishing line assisted endoscopic placement of multiple plastic biliary stents for
unresectable malignant hilar biliary obstruction: a retrospective study
Version: 0 Date: 22 Sep 2021
Reviewer's report:
The aim of this study was to evaluate the feasibility and efficiency of the fishing line assisted
(FLA) method for preventing the complication.
However, this manuscript has some issues that need to be addressed.
1) As the authors mentioned, straight biliary stents are easier to migrate during multiple plastic
biliary stents placement. However, single pig-tail stent or inside stent may have prevented stent
migration without FLA method.
2) The idea of using fishing line to prevent stent migration is interesting. However, the use of
fishing lines in endoscopic therapy may be ethically problematic.
3) Types and size of plastic stents used in this study are unclear.
4) Details of patients’ characteristics are unclear.
5) How did the author make the side hole at the distal end of the plastic stents?
6) It is difficult to understand the process of retrieving the fishing line from the first  plastic
biliary stent  in Video1.
7) Specific P-value should be presented in the Tables.
assistant