Table 2.

Tumour incidence

Internal carotid artery i njection	CRCTU		ATCC
Early time point (n=5)	24 hours	0% (0/5)	24 hours	0% (0/5)
Intermediate time point (n=5)	6 days	20% (1/5)	4 weeks	0% (0/5)
Late time point (n=9)	9 days	89% (8/9)	10 weeks	11% (1/9)
Direct inoculation	CRCTU		ATCC
(n=6)	7 days	100% (6/6)	4 weeks	0% (0/6)

Tumour incidence in animals injected via the internal carotid artery or directly inoculated into the brain with Walker 256 breast tumour cells obtained from the Cell Resource Centre for Medical Research at Tohoku University (CRCTU) or the American Type Culture Collection (ATCC).