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Schimmel DH, Bruognolo B, von Delft J.Schimmel DH, et al.Phys Rev Lett. 2017 Nov 10;119(19):196401. doi: 10.1103/PhysRevLett.119.196401. Epub 2017 Nov 7.Phys Rev Lett. 2017.PMID: 29219510