Received: 21 July 2019
Accepted: 5 May 2020
First Online: 4 June 2020
Ethics approval and consent to participate
: Ethical approval was granted from all relevant local authorities and obtained from the Medical Research Ethics Committee (MREC), registration number NMRR (National Medical Research Registration) # (2) KKM/NIHSEC/08/0804/P 67–177. Due to the study nature, patient consent was not applicable.
: Not applicable.
: The authors declare that they have no competing interests.