Comparison of placebo arm values according to order of amantadine and placebo.

Abbreviations: AP group = Amantadine on 1st admission and then Placebo on 2nd admission; PA group = Placebo on 1st admission and then Amantadine on 2nd admission; Other abbreviations are same as in Table 1.*Repeated measures ANOVA for total 6 repeated data of placebo arm of each group.†Repeated measures ANOVA only for data at 1 hr after injection (total 3 repeated data of placebo arm of each group).‡Mann-Whitney U test.