Fig. 1
![Fig. 1](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs12885-018-4445-z/MediaObjects/12885_2018_4445_Fig1_HTML.gif)
Weight of primary tumour (a), * indicates p < 0.05; *** indicates p < 0.001; **** indicates p < 0.0001 vs. 2-week group, number of metastases in the lungs (b), ** indicates p < 0.01 at 2, 4, 5 and 6 weeks after cancer cell inoculation in mice. Results are expressed as mean ± SEM, n = 10–17