.Many volunteers did not attend visit seven as the study followup was paused by National ethics.
.All volunteers were contacted and informed about pause of study visits.
.When trial allowed to continue few volunteers are called in at a time all the prevention measures for COVID 19 are taken care. This includes hand washing in gate just before they get in and at the clinic door washing hands and or sanitizing. Observing social distance, Musk distributed to volunteers by study.