Correction to: Single-Cell Biodetection by Upconverting Microspinners (Small, (2019), 15, 46, (1904154), 10.1002/smll.201904154) - Ortiz-Rivero E; Skowicki M; Prorok K; Lu D; Lipinski T; Bednarkiewicz A; Jaque D; Haro-González P (Small, 2020)