Retraction notice to "Comparison of the efficacy and side effects of Fixed-does combination of Aclidinium/Formoterol and Monotherapy of Aclidinium or Formoterol in COPD: A meta-analysis" [YMHL 51C (2022) 25-31]
1 The First Clinical College of Zhejiang Chinese Medical University, Hangzhou, China.
2 The First Clinical College of Zhejiang Chinese Medical University, Hangzhou, China; Taizhou Hospital of Zhejiang Province affiliated to Wenzhou Medical University, Taizhou, China.
3 The First Clinical College of Zhejiang Chinese Medical University, Hangzhou, China; The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China.