Injection of larger volumes caused significantly more pain -LSB- VAS least square mean differences @ vs. @ l , @ @ mm ( @ % confidence interval - CI ; @-@ @ ; p < @ ) ; @ vs. @ l , @ mm ( @-@ @ ; p < @ ) ; @ vs. @ l , @ mm ( @-@ @ ; p = @ ) and @ vs. @ l , @ mm ( @-@ @ ; p = @ ) -RSB- .