Hemophilia A, Acquired

This is a multicenter, prospective, longitudinal, observational cohort study to investigate thrombosis and hemostasis diseases in Chinese patients. This study will collect basic information, diagnostic and treatment information, as well as medical expense information of patients from medical records.The incidence and risk factors of thrombosis and hemostasis diseases, the treatment methods, prognosis and medical expenses of these patients in China will be analyzed. The study will use questionnaire to measure the exposure of patients, and prospectively follow-up to collect the prognosis information.