Long-Term Extension Study of Ofatumumab in Subjects With Pemphigus Vulgaris

Ofatumumab (human monoclonal antibody) will be provided as a liquid concentrate in a prefilled glass syringe with staked needle, stopper, and plunger containing 0.4 millilitre (mL) (20 mg) drug product of 50 mg/mL concentration

Acetaminophen/paracetamol will be supplied by study centre as 1 gram tablet, caplet, capsule or liquid for oral administration

Antihistamine (cetirizine or equivalent) will be supplied by study center as 10 mg tablet, caplet, capsule or liquid for oral administration

Prednisone/Prednisolone will be supplied from the dose range 2.5, 5, 7.5, 10, 12.5, 15, 17.5, 20, 25, 30, 40, 50, 60, 80, 100, 120, 140, 160, 180, 200, 220 and 240 mg for oral administration