Non-adherent cells were then harvested, layered on a Ficoll-Hypaque gradient, and cultured for two more days, by which time large populations of adherent monocyte/macrophage-like cells had formed on the bottoms of the culture plates, as previously described [23].
![[This page as RDF]](http://data.gesis.org/somesci/static/rdf-icon.gif){kind=icon}