In this prospective , open-label , randomized , active-controlled , multicenter @-week study , patients not meeting the target BP after @ weeks of treatment with low-dose monotherapy were randomized to receive nifedipine GITS @mg plus valsartan @mg ( N@ + V@ ) , nifedipine GITS @mg ( N@ ) , or valsartan @mg ( V@ ) for a further @ weeks .