Recruitment Details This study was recruited at 12 centers in Korea during the period of May 2006 to May 2009.
Arm/Group Description Initial dose was 100 mg/day, increased by 100 mg. The maximum dose was 600 mg/day. Initial dose was 100mg/day, increased by 200mg every 1 week to 600mg/day. The maximum dose was 1200mg/day.
Initial dose was 100 mg/day, increased by 100 mg. The maximum dose was 600 mg/day.