Funding for this research was provided by:
the National key R & D plan “public security risk prevention and control and emergency technical equipment” (2020YFC0861000)
Received: 16 April 2020
Accepted: 2 September 2020
First Online: 11 September 2020
Ethics approval and consent to participate
: This study only analyzed pre-existing non-identified data from an international registry; thus, no ethics approval was required. Similarly, no patient consent was required. The data collection was approved by the National Health Commission of China.
: The authors declare that they have no competing interests.