Periodically, the Centralized Secure Database 101 is synched with {HEAD ~ Administrator Database} 104 and {TAIL ~ each Investigator Database} 106 
Periodically , the Centralized Secure Database 101 is synched with { HEAD ~ Administrator Database } 104 and { TAIL ~ each Investigator Database } 106
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH