Titrating Rituximab to Circulating B‐Cells Starting From an Ultra‐Low Dose for Moderate‐to‐Severe Pemphigus. - Wang, Rui; Wang, Sai; Shang, Panpan; Chen, Xixue; Li, Ruoyu; Wang, Mingyue; Saleem, Suraiya (Dermatologic Therapy, 2026)