Relative expression of smedwi-1 at 13 and 50 days of regeneration after either cct3A or gfp RNAi under feeding and starved conditions. Error bars are s.d. from the mean and asterisks indicate P < 0.001 (three asterisks), P < 0.05 (one asterisk) and n.s. indicates not significant using two-tailed Student's test with equal variance. n = 3 replicates (5 planarians each) per time point. 