Patienterne blev observeret uden behandling for at se forekomsten af rebound (PASI ≥ 150% i forhold til baseline) og se tiden tilrelapse (defineret som tab af mindst halvdelen af forbedringen opnået mellem baseline og uge 24).
Patients were observed off treatment for the occurrence of rebound (PASI  150% of baseline) and for the time to relapse (defined as a loss of at least half of the improvement achieved between baseline and week 24).