A Study to Evaluate the Efficacy, Safety, Tolerability, Pharmacokinetic Characteristics, and Immunogenicity of Plonmarlimab in Subjects With Rheumatic and Immunological Disease-associated Haemophagocytic Lymphohistiocytosis (HLH) (Also Known as Macrophage Activation Syndrome (MAS))

Beijing Friendship Hospital, Capital Medical University, Beijing

Renji Hospital of Shanghai Jiaotong University School of Medicine, Shanghai

Beijing Peking Union Medical College Hospital, Beijing

Beijing Peking University People's Hospital, Beijing

The First Affiliated Hospital of Nanjing Medical University, Nanjing

Ruijin Hospital Of Shanghai Jiao tong University School of Medicine, Shanghai