Have you ever extracted white cells from a patient?

Question: Have you ever extracted white cells from a patient?
- Keywords:
  extract,
  patient,
  white blood cell
Asked by Jana to Max, Francis on 12 Mar 2018.
- Francis Man answered on 12 Mar 2018:
  
  Yes, it’s something I do regularly. You have to take some blood, afterwards you centrifuge the blood to separate the cells. Depending on how fast you centrifuge and what kind of solution you add (there are sugar-based solutions of varying densities) you can separate different types of cells.

Question: Have you ever extracted white cells from a patient?