Complex sentence: Development of LeukArrest was halted in April 2000 when interim data from phase III clinical trials did not meet Icos's goals of significantly reducing the chance of multiple organ failure and reducing the death-rate from shock at 28 days.
Split into simpler sentences: Development of LeukArrest was halted in April 2000 when interim data from phase III clinical trials did not meet Icos's goals. The company's goals for LeukArrest included reducing the chance of multiple organ failure and reducing the death-rate from shock at 28 days.