Additional file 1.

Classification of three-dimensional tumor spheroid morphology. Representative examples are shown: (a) SF188: tight spheroid; (b) MDA-MB-231 P: compact aggregate; (c) IGROV-1: loose aggregate; (d) IGROV-1 compact aggregate upon Matrigel addition. Scale bar: 200 μm.

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Vinci et al. BMC Biology 2012 10:29   doi:10.1186/1741-7007-10-29