Funding for this research was provided by:
French Initiative 5% – Expertise France (15SANIN213)
Received: 13 August 2020
Accepted: 26 December 2020
First Online: 18 January 2021
Ethics approval and consent to participate
: The protocol of this study was reviewed and approved by the Institutional Ethics Committee of the Institut de Recherche en Sciences de la Santé (IEC-IRSS) and registered as No. A06/2016/CEIRES. Spay operators, supervisors and householders gave their written informed consent.
: Not applicable.
: The authors declare that they have no competing interests.