one or more investigator databases communicatively connected to {HEAD ~ said centralized secure database} whereby {TAIL ~ information} residing in said one or more investigator databases is periodically transferred to said centralized secure database and said information is not shared directly between any of said one or more investigator databases 
one or more investigator databases communicatively connected to { HEAD ~ said centralized secure database } whereby { TAIL ~ information } residing in said one or more investigator databases is periodically transferred to said centralized secure database and said information is not shared directly between any of said one or more investigator databases
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