Contributions from authors
All authors have approved the final article
Criss Koba, Chadrack KabeyA, Robert Lukamba Mbuli and Murielle
Nkumuyaya: study design and planning
Benjamin Kabyla, Desiré Mashinda and Oscar Luboya Numbi: supervision
Criss Koba and Chadrack Kabeya: statistical analysis and proofreading of
the article
Criss Koba and Chadrack Kabeya: documentary research and formatting of
the work
Funding
This research received no external funding