TY - JOUR AU - Trachtenberg, J E; Placone, J K; Smith, B T; Fisher, J P; Mikos, A G TI - Extrusion-based 3D printing of poly(propylene fumarate) scaffolds with hydroxyapatite gradients JO - J Biomater Sci Polym Ed IS - 06 VL - 28 PY - 2017 DO - 10.1080/09205063.2017.1286184 L3 - PubMed-ID: 28125380 SP - 532 EP - 554 ER -