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. 2017 Sep 29;14:186. doi: 10.1186/s12985-017-0857-7

Fig. 4.

Fig. 4

Cross hemagglutination inhibition values for anti-NDV chicken sera (a) and pigeon sera (b) against Lasota, ND167 and ND132. Data are presented as mean ± standard deviation. The statistical differences between each group of values were determined by two-way ANOVA and labeled in the figures. (* P < 0.05; ** P < 0.01; ns, no significant difference)