Received: 3 April 2022
Accepted: 18 August 2022
First Online: 24 August 2022
: This case series was reviewed and approved by the Institutional Review Board at University Medical Center, University of Medicine and Pharmacy at Ho Chi Minh city (approval number: 215/HDDD-BVDHYD). All methods were performed in accordance with the Declaration of Helsinki.
: Oral informed consent for publication was obtained from the families of deceased patients due to travel restrictions during the lockdown period, and written informed consent for publication was obtained from patients or their families upon discharge.
: The authors declare that they have no competing interests.