Table 1.

In vitro invasiveness of SCLC cells

	Cells/field
	NCI-N-592	GLC8
Untreated cells	53.6  ±  1.8	19.6  ±  0.9
NGF-treated cells	28  ±  0.9*	1  ±  0.4*

Untreated and NGF-treated cells were plated on Matrigel-coated filters. After a 24 h incubation cells attached to the lower face of the filter were fixed, stained and counted. 

^*P < 0.001 versus untreated cells by ANOVA followed by the Fisher PLSD.