Table 1. Hypoxic fractions of four kinds in tumors of various sizes.

*95% confidence interval

Tumor	Site	Size, mm	Hypoxic fraction
RIF1	Subcutaneous	10	4.7% (3.3-6.6)*
B16	Subcutaneous	10	4.5% (3.2-6.2)*
SCCVII	Subcutaneous	5	0.86% (0.42-1.7)*
	Subcutaneous	10	8.5% (6.9-11)*
	Subcutaneous	18	8.4% (6.1-12)*
EMT6	Subcutaneous	6	5.9% (3.9-8.8)*
	Subcutaneous	10	14% (9.9-19)*
	Subcutaneous	16	22% (15-33)*
	Intradermal	6	16% (12-21)*