We, the Editors, Authors and Publisher of the journal Artificial Cells, Nanomedicine, and Biotechnology, have retracted the following article: Hanyang Zhang, Jianhang Jiao & Hui Jin (2019) Degradable poly-L-lysine-modified PLGA cell microcarriers with excellent antibacterial and osteogenic activity. Artificial Cells, Nanomedicine, and Biotechnology, 47:1, 2391–2404, DOI: 10.1080/21691401.2019.1623230 Since publication, the authors continued their study and found that the original experimental results were unverifiable. The authors checked their data and confirmed there are fundamental errors present....