Model acupuncture point: Bone marrow-derived stromal stem cells are moved by a weak electromagnetic field

Table 1 The examination of magnetized rod action on rat bone marrow-derived stromal stem cells proliferation

Exposure time (d)	The average of three independent replicates of the experiment (the number of cells is × 103/cm2± SE)		Experimental t statistic	Standard t statistic (tst)	Experimental U statistic	Standard U statistic (Ust)
	Experiment	Control
1	10.77 ± 3.31	10.67 ± 1.28	0.06	tst = 2.78 when the number of degrees of freedom κ = 4 and P = 0.05	3	Ust = 0 when the number of observations n1 = n2 = 3, P = 0.05
3	20.33 ± 2.36	21.67 ± 0.47	1.78		2
6	31.77 ± 2.29	30	2.76		3
from 3 to 6	11.44 ± 3.24	8.33 ± 0.47	1.12