[1] Univ Freiburg, Dept Chem Pharm & Earth Sci, D-79104 Freiburg, Germany
[2] Univ Freiburg, Inst Macromol Chem Excellence Cluster, D-79104 Freiburg, Germany
[3] Univ Freiburg, Ctr Biol Signalling Studies Bioss, D-79104 Freiburg, Germany
[4] GKSS Res Ctr Geesthacht GmbH, Polymer Res Inst, D-14513 Teltow, Germany
[5] Berlin Brandenburg Ctr Regenerat Therapies, D-13353 Berlin, Germany