Done... I hope you don't mind I took completely over the subsection 4.1, which now extends from the last lines on page 5 to the first few on page 8. In facts, I have concentrated everything in this subsection, even some considerations that I recognise could go under the subsection 5.2. This has been an explicit choice, to maintain the reflection contained, without requesting the reader to move forth and back.
The text is nevertheless structured in such a way that I could easily copy-paste the relevant parts elsewhere, should you let me know that you prefer so.
I also finally added my name, just so that we do not forget (I would, most likely... it happened before, and nobody was happy sending an amendment to the editor later). I "claimed" the 3rd position, so I hope it will not disturb anyone (in medicine the meaningful positions tend to be 1st, 2nd, and last)... Anyone, change order to your heart's desire, I don't need this for my career, I am just glad to have my name where I contribute