Taiwan Severe Asthma Biologic Registry

Exclusion Criteria

• •Lack of informed consent for participation.
• •History of Biologic usage before January 1, 2020, should be ruled out.
• •The washout period should be at least 12 months. In other words, the enrolled patients should have no experience in receiving a biological treatment or in participating relative clinical trial before his/her biologic initiation.
• •Comorbid pulmonary diseases (e.g.: Chronic Obstructive Pulmonary Disease, Bronchiectasis, Pulmonary Fibrosis, etc.) or risk factors (e.g.: smoking or environmental exposure, etc..) that could be associated with pulmonary or systemic diseases, other than Asthma.