Serum GH concentrations (ng/mL) in Group T1, T2 and C immunised with ptCS/2SS-asd, ptS/2SS-asd + pCpG-asd and naked pVAX-asd, respectively, on weeks 0, 3, 6, 10 and 20 after primary immunisation. Data are shown as means ± SD. *P < 0.05.