Super Ready wrote:
Yep, it's the Apothecaries. You kinda have to piece it together from the Codex fluff. However, we also know (I believe from previous White Dwarfs) that it's not a one-man job, so once the Apothecary's done with the surgery some tasks will likely fall to Chapter Serfs and perhaps Servitors. Serfs are often referred to in Marine fluff, and can be Aspirants that showed promised but didn't quite make the grade, recruited straight from the homeworld as a position bearing honour to those back on the planet, or as Marines too old or injured to be useful in combat. Those last ones usually find other duties in things like training drills and strategy/tactics lessons, however.