At steady state, 8 children aged 6-11 years received mean  SD doses of 1.75  0.71 mg/ day (0.064  0.018 mg/ kg, 1.65  0.43 mg/ m2) while 14 adolescents aged 12-18 years received mean  SD doses of 2.79  1.25 mg/ day (0.053  0.0150 mg/ kg, 1.86  0.61 mg/ m2).