Review for 10.1186/s12876-021-01726-4 (2021)

Reviewer’s report
Title: 
Dorsal approach with Glissonian approach for laparoscopic right anatomic
liver resections
Version: 
4 
Date: 
02 Mar 2021
Reviewer's report:
PEER REVIEWER ASSESSMENTS: 
OBJECTIVE - Full research articles: is there a clear objective that addresses one
or several testable research questions? (Brief or other article types: is there a
clear objective?)
Yes - there is a clear objective
DESIGN - Is the current approach (including controls and analysis protocols)
appropriate for the objective?
Yes - the approach is appropriate
EXECUTION - Are the experiments and analyses performed with sufficient
technical rigor to allow confidence in the results?
Yes - experiments and analyses were performed appropriately
STATISTICS - Is the use of statistics in the manuscript appropriate?
Yes - appropriate statistical analyses have been used in the study
INTERPRETATION - Is the current interpretation/discussion of the results
reasonable and not overstated?
No - there are minor issues
OVERALL MANUSCRIPT POTENTIAL - Has the author addressed your
concerns sufficiently for you to now recommend the work as a technically sound
contribution? If not, can further revisions be made to make the work technically
sound?
Probably - with minor revisions
PEER REVIEWER COMMENTS: 
GENERAL COMMENTS: The authors have significantly improved the
manuscript. 
The videos are also impressive and speak to the advanced
laparoscopic skills of the authors. 
The paper is more succinct now. 
REQUESTED REVISIONS: 
As a further recommendation, I suggest the authors to emphasize the benefits of
this approach over the anterior approach throughout the manuscript. 
For instance,
I would mention in Discussion that " Although the global experience with
laparoscopic major hepatectomy is increasing, it is still a technically demanding
procedure, especially related to the management of hepatic veins. 
An anterior
approach is frequently used, but does not provide the safest exposure to the
hepatic veins and inferior vena cava. 
Dorsal approach is an alternative option to
dissect the vasculature through a better and safer exposure. 
Nevertheless, the
experience with this approach is scant in the literature. 
This paper describes the
technical details of this approach and provides perioperative outcomes from our
initial experience". 
In conclusions, " We believe that dorsal approach is a safer alternative to the
anterior approach for laparoscopic anatomic liver resections. 
Our initial
experience demonstrates that this approach is feasible. We felt that this approach
provided us with a safe exposure to the hepatic vasculature in laparoscopic
anatomic right hepatic resections. 
" 
In the current format, although the manuscript is more succinct, the authors are
not emphasizing the advantages of their technique compared to the anterior
approach.
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Is the study design appropriate to answer the research question (including the use
of appropriate controls), and are the conclusions supported by the evidence
presented?
No
Are the methods sufficiently described to allow the study to be repeated?
Yes
Is the use of statistics and treatment of uncertainties appropriate?
Yes
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Yes
Are the images in this manuscript (including electrophoretic gels and blots) free
from apparent manipulation?
Yes