Table 1: NSPCs cultures studied.

Culture	Presence of FBS in culture medium	Days in culture prior to co-cultivation with monocytes	Passage number
C56	no	48	5
C69	no	36	4
c235	no	12; 52	0; 6
S235	yes	12; 52	0; 6
S163	yes	62	7
S164	yes	51	5
S170	yes	38	4