“…Prior to the approval of the first biologic therapies for AQP4-IgGseropositive NMOSD in 2019 and 2020, maintenance treatment centered around the off-label use of nonspecific immunosuppressive therapies (ISTs) such as oral corticosteroids, azathioprine (AZA), mycophenolate mofetil (MMF), and rituximab (Brod, 2020;Held et al, 2021;Jarius et al, 2020). Oral corticosteroids continue to be the mainstay of NMOSD maintenance treatment in some countries, as they are inexpensive, accessible, and have been shown to effectively suppress relapses in some patients (Akaishi et al, 2021;Kessler et al, 2016;Soares-Dos-Reis et al, 2021;Takai et al, 2021;Watanabe et al, 2007). However, chronic steroid use is associated with a number of serious complications, including facial swelling (often referred to as 'moon face'), weight gain, hypertension, hyperglycemia, glaucoma, and osteoporosis (Kessler et al, 2016;Kimbrough et al, 2012;Takai et al, 2021).…”