<i>Ex vivo</i> cell labeling with <sup>64</sup> Cu–pyruvaldehyde-bis( <i>N</i> <sup>4</sup> -methylthiosemicarbazone) for imaging cell trafficking in mice with positron-emission tomographyNora Adonai, Sanjiv S. Gambhir, Joseph C. Walsh et al.|Proceedings of the National Academy of Sciences|2002Cited by 341