(B) Tubule formation (virtual microscopy)	Tubule formation (light microscopy)			Total %
	Score 1	Score 2	Score 3
Score 1	43	13	2	3.5
Score 2	67	231	34	19.8
Score 3	12	265	1008	76.7
Total %	7.3	30.4	62.3	100
Per cent exact agreement: 76.6%, per cent adjacent level: 22.6%, per cent high/low: 0.8%