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Heterogeneity of myeloid cell populations in X. laevis larvae: macrophagess-like cells project lamellipodia in the direction of movement. Transmitted light and GFP fluorescent emission merged time-lapse version of the same video shown in video 4. A video clip is available online. Supplementary material related to this article can be found online at doi:10.1016/j.ydbio.2015.03.008.
