preparation for
immunohistochemical evaluation was carried out in the Histology and
Tissue Analysis Core at Dell Pediatric Research Institute (DPRI) at
The University of Texas at Austin. The formalin-fixed tumor tissues
were embedded in paraffin wax, sectioned, and stained with an antibody
against CD-31 (Abcam, Cambridge, MA, USA) as a marker for angiogenesis
(n = 3).41 (link) Slides were
then scanned, and images were taken using the ScanScope XT (Aperio
Technologies, Vista, CA, USA).