LOL what a terrifying responsibility! Tango I have to admit I DON'T know but can only guess.
I did the milk diet for 10 days but my liver as not particularly shrunk at surgery - and I stuck to it like glue!
I'm guessing some surgeons are just more fussy and 'careful' than others.
From my knowledge of surgeons (I was a nurse for 20 years) they're a fussy lot, they tend to be 'prima donnas'; and each has their own 'signature' in the way the like things to be done
Even surgeons working side-by-side can vary enormously in their preferences: one likes this particular instrument, another this particular suture (stitch) it's a big job for nurses who work in theatres to KNOW INSIDE OUT each surgeon's preference....because like divas, they can be known to throw huge hissy fits if they don't get just what they want!