Representative cell morphology from the different culture conditions at the end of passage 1 (P1). SEHI: Suspension culture plastic, Expansion medium, High density; SELO: Suspension culture plastic, Expansion medium, Low density; TEHI: Tissue culture plastic, Expansion medium, High density; TSHI: Tissue culture plastic, Stromal medium, High density; TSLO: Tissue culture plastic, Stromal medium, Low density