@article {pmid31756031,
	title = {Live Cell Monitoring and Enrichment of Stem Cell-Derived β Cells Using Intracellular Zinc Content as a Population Marker},
	journal = {Curr Protoc Stem Cell Biol},
	volume = {51},
	year = {2019},
	month = {12},
	pages = {e99},
	author = {Davis, J. C. and Helman, A. and Rivera-Feliciano, J. and Langston, C. M. and Engquist, E. N. and Melton, D. A.}
}
