**Author details**

Kelvin Melkizedeck Leshabari1,2

1 Ageing Research Working Group, Registered Trustees of Ultimate Family Healthcare, Dar es Salaam, Tanzania

2 Cardio-metabolic Risk Research Group, H3 Research Unit of I-Katch Technologies Ltd., Dar es Salaam, Tanzania

\*Address all correspondence to: celsius\_lx@yahoo.co.uk; kelvin@familyhealth.or.tz

© 2021 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
