In one embodiment, the system and method allows investigators to contact participants without disclosing confidential contact information of the participants to {HEAD ~ the investigators} by storing health information and {TAIL ~ contact information} in separate databases 
In one embodiment , the system and method allows investigators to contact participants without disclosing confidential contact information of the participants to { HEAD ~ the investigators } by storing health information and { TAIL ~ contact information } in separate databases
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH