ERESEARCHTECHNOLOGY INC S-1/A

FORM S-1/A

EXHIBIT 1.1

EXHIBIT 3.1

EXHIBIT 4.1

EXHIBIT 5.1

EXHIBIT 10.5

EXHIBIT 10.8

EXHIBIT 10.10

EXHIBIT 10.19

EXHIBIT 10.20

EXHIBIT 23.1

FINANCIAL DATA SCHEDULE

FINANCIAL DATA SCHEDULE