Fronteira, Inês
Freitas, Helga
Guimarães, Nkanga
Fresta, Mário
Ferrinho, Paulo
Article History
Received: 13 November 2020
Accepted: 16 July 2021
First Online: 1 September 2021
Declarations
:
: All methods were carried out in accordance with relevant guidelines and regulations. Study protocol was approved by Ministry of health of Angola. Informed consent was obtained from all subjects.
: Not applicable.
: The authors declare that they do not have any competing interests.