The Sixth Affiliated Hospital of Sun Yat-sen University Guangzhou 510655 Guangdong China;
The Sixth Affiliated Hospital of Sun Yat-sen University Guangzhou 510655 Guangdong China;
The Sixth Affiliated Hospital of Sun Yat-sen University Guangzhou 510655 Guangdong China;
The Third Affiliated Hospital of Sun Yat-sen University Guangzhou 510655 Guangdong China;
Rheumatoid arthritis; childbearing age; pregnancy; lactation decision-making factors;