 There will be up to 22 subjects in each group, with a total of up to 66 subjects in the study. Up to 80 subjects will be enrolled in order to have 66 subjects completed the study. The calculation is based on 2 point difference in VAS pain and discomfort survey to have 80 power, while setting α0.025 to adjust for the two primary outcomes pain and discomfort which gives 19 per each group. However, considering a 15 drop out rate, up to 22 subjects for each group will be recruited. 