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The conclusion is reliable only based on three retrospective studies with limited patients?

  • Meng-Si Luo
  • Guan-Jiang HuangEmail author
Letter to the Editor

Notes

Author contributions

Dr. Meng-Si Luo drafted the letter, and Dr. Guan-Jiang Huang revised the letter.

Funding

None.

Compliance with ethical standards

Conflict of interest

The authors declares that they have no conflict of interest.

Ethical approval

This article does not contain any studies with human participants or animals performed by any of the authors.

References

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Anesthesiology, Zhongshan Hospital of Traditional Chinese MedicineAffiliated to Guangzhou University of Chinese MedicineZhongshanChina
  2. 2.Department of Otorhinolaryngology, The Second Affiliated Hospital, School of MedicineZhejiang UniversityHangzhouChina

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