Lu Feng1, Shaojun Liang1, Yongyong Zhou2, Yixue Luo1, Ruoyu Chen1, Yuyu Huang1, Yiqing Chen1, Mingen Xu2,* and Rui Yao1,*
1 Key Laboratory for Advanced Materials Processing Technology of Ministry of Education, Biomanufacturing and Rapid Forming Technology Key Laboratory of Beijing, Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
2 Key Laboratory of Medical Information and 3D Bioprinting of Zhejiang Province, Hangzhou Dianzi University, Hangzhou 310018, China