Received: 24 November 2020
Accepted: 1 April 2021
First Online: 17 April 2021
: This study was approved by the Research and Ethics Review Committee of Kilimanjaro Christian Medical University College (Certificate No. 2226) and the Zanzibar Medical Research Ethics Committee. The research permit was granted by Zanzibar Research Council. All methods were carried out in accordance with relevant guidelines and regulations along with the approval. Informed consent was obtained from all study participants.
: Not applicable.
: The authors declare that they have no conflict of interests.