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