Patients with a diagnosis of SLE confirmed by ACR or SLICC classification criteria with moderate-to-severe disease by SLEDAI-2K criteria (Modified SLEDAI-2K score ≥4 or SLEDAI-2K score ≥6 points), a historic or current positive serology for ANA or dsDNA, and a 6-month minimum treatment duration with systemic SLE treatment beyond NSAIDS and analgesics