The name of Yuan Lin was represented incorrectly in the Frontispiece text. The correct name should appear as follows: “In article number 1702689, Lei Yang, Yuan Lin, Brian W. Sheldon, and co-workers report that cell filopodial extension on ultrastiff, disordered topography is governed by the contact between filopodial tip and surface asperities. Both experimental and modeling evidence reveal extension dynamics distinct from those reported on soft or ordered topographies and therefore provide key information to understand and design the biointerface of medical implants.” We apologize for any inconcenience or misunderstanding that this error may have caused. © 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim