1. Targeted labeling of an early-stage tumor spheroid in a chorioallantoic membrane model with upconversion nanoparticles. Issue 5 (16th December 2014) Authors: Liu, Kai; Holz, Jasmin A.; Ding, Yadan; Liu, Xiaomin; Zhang, Youlin; Tu, Langping; Kong, Xianggui; Priem, Bram; Nadort, Annemarie; Lambrechts, Saskia A. G.; Aalders, Maurice C. G.; Buma, Wybren Jan; Liu, Yichun; Zhang, Hong Journal: Nanoscale Issue: Volume 7:Issue 5(2015) Page Start: 1596 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗