Clinical Improvement measured as the percentage of subjects at Day 14 who are in categories 1-3 according to the World Health Organization (WHO) 8-point Ordinal Scale for Clinical Improvement, comparing AZD1656 treatment to placebo.

Clinical Improvement measured as the percentage of subjects at Day 14 who are in categories 1-3 according to the World Health Organization (WHO) 8-point Ordinal Scale for Clinical Improvement, comparing AZD1656 treatment to placebo.