IGF1 and hereditary elliptocytosis: There was no significant effect of dietary energy level on IGF-1 concentration (p > 0.05) on day 30 (Figure 1(1-3)), however higher IGF-1 concentration (p = 0.010 and p = 0.044) was observed in the ME group but no significant difference (p > 0.05) was observed between LE and HE dietary groups on day 60 (Figure 1(1-4)).