Updates are available Correction dated 2019-12-12

Article History

Received: 25 April 2019

Accepted: 20 September 2019

First Online: 29 October 2019

Change Date: 12 December 2019

Change Type: Correction

Change Details: Please be advised that following publication of the original article [1], the authors have identified the following errors with the scientific content.

Ethics approval and consent to participate

: The study design and protocol was conducted in accordance with the guidelines of the Helsinki Declaration, and was approved by Ethical Review Committee (ERC) of Peking Union Medical College (Beijing, China), and China Medical University (Shenyang, China). Informed, written consent to participate was obtained from the parents or legal guardians of the participants under the age of 16 or the participants who are over the age of 16.

: Informed, written consent for publication of the participants (under the age of 18) clinical details and/or clinical images was obtained from their parents or legal guardians or the participants who are over the age of 18.

: The authors declare that they have no competing interests.