Multitheragnostic Multi‐GNRs Crystal‐Seeded Magnetic Nanoseaurchin for Enhanced In Vivo Mesenchymal‐Stem‐Cell Homing, Multimodal Imaging, and Stroke TherapyPo‐Jung Chen, Woei‐Cherng Shyu, Yi‐Da Kang et al.|Advanced Materials|2015Cited by 62