Received: 19 February 2021
Accepted: 24 September 2021
First Online: 11 October 2021
: The study protocol is performed in accordance with the relevant guidelines. The waiver for ethical approval was obtained from the ethics committee at the Ministry of Public Health as the case-based investigation falls under public health surveillance and emergency. The procedure for obtaining verbal informed consent was approved by the ethics committee at the Ministry of Public Health.
: Not applicable.
: The authors declare no competing interests.