Cover Picture: Biotechnology Journal 5/2017

The cover shows a cartoon of wave motion that provides an ideal hydrodynamic environment to induce cell‐cell collision and subsequent aggregation of human mesenchymal stem cells with controlled aggregate size in suspension. The cover is prepared by Ang‐Chen Tsai, Yijun Liu, Xuegang Yuan, Ravindran Chella and Teng Ma authors of the article ”Aggregation kinetics of human mesenchymal stem cells under wave motion“ ( https://doi.org/10.1002/biot.201600448 ).