1. Division of Rheumatology, Tongji Hospital of Tongji University School of Medicine, Shanghai 200065, P.R. China
2. Division of Respiratory Medicine, Tongji Hospital of Tongji University School of Medicine, Shanghai 200065, P.R. China
3. Center for Regenerative Medicine, The First People's Hospital of Yunnan Province, Kunming, Yunnan 650032, P.R. China