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 {TAIL ~ health information} and contact information in separate databases 
by storing
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 { TAIL ~ health information } and 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 TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH