Live/dead assay. Human bone marrow stromal cells were seeded onto the surface of sterile PLAprinted scaffolds (3 for each pore size) into 24-well plates at a final density of 105 cells / cm² andincubated at 37 °C in a humidified atmosphere containing 5% CO2 in air. Prior to experiment, eachwell was coated with 1 mL of agarose (Sigma-Aldrich Co, A9539; 2% (w/v) in 1X PBS) to avoid celladhesion on the tissue culture plastic. Each scaffold was also stabilized with a glass ring crimped byagarose. After 3 and 7 days of culture, cell viability was determined using live/dead assay (Invitrogen®,Cat No L3224).