Treatment details Day -07: Screening; Day 00 Baseline: 1st Adacolumn® apheresis; Day 07: 2nd Adacolumn® apheresis; Day 14: 3rd Adacolumn® apheresis; Day 21: 4th Adacolumn® apheresis; Day 28: 5th Adacolumn® apheresis; Week 12:Final evaluation