Table 1. General tumour growth parameters for the different groups.

The average allocation time is given in days after injection required to achieve a tumour volume of about 10 mm³; the number of animals per group (n) and take rates are included for completeness. The differences between the scheduled (18) and actual number of animals per group arose from failed injections, i.e. by accidental ear piercing, premature dead after injection or problems with the cell suspension in the case of the FaDu PBS group.

Cell Number	FaDu				LN229
	n	Take rate	Allocation rate	Allocation time / d (± sem)	n	Take rate	Allocation rate	Allocation time / d (± sem)
PBS
1*106	10	0.70	0.57	18.8 ± 2.8
1*105					19	0.84	0.69	106.2 ± 9.7
9.7 mg/ml Matrigel
1*106	16	1.0	0.69	7.4 ± 1.5
1*105	16	1.0	0.69	13.3 ± 1.7	19	0.95	0.50	23.6 ± 2.0
1*104	16	0.81	0.62	19.4 ± 2.0	19	0.89	0.75	28.5 ± 2.7
1*103	17	0.82	0.36	26.0 ± 3.0	13§	0.92	0.36	45.8 ± 3.9
1*102					18	0.39	0.0	---
4.85 mg/ml Matrigel (MG:PBS 1:1)
1*106	15	0.93	0.21	13.7 ± 4.6
1*105	16	0.94	0.53	18.9 ± 1.1
1*104	16	0.94	0.53	24.9 ± 2.3
1*103	16	0.56	0.44	27.8 ± 1.7

^§ During injection of the 2^nd cohort of LN229 premature gelatinisation of MG causes a stop of injection in that particular group; the remaining animals of that group were allotted to the other groups.