0000950133-01-500891 SC 13G 1 20010503 JOHN P. MCNIFF LONGWOOD INVESTMENT ADVISORS INC/PA ROBERT A. DAVIDSON CLINTRIALS RESEARCH INC 0000870978 8734 621406017 DE 1231 SC 13G 34 005-48381 1621445 11000 WESTON PARKWAY CARY NC 27513 9194622556 11000 WESTON PARKWAY CARY NC 27513 CLINTRIALS INC 19930930 LONGWOOD INVESTMENT ADVISORS INC/PA 0001034383 232745059 PA 1231 SC 13G THREE RADNOR CORPORATE CENTER RADNOR PA 19087 6109959559 THREE RADNOR CORPORATE CENTER SUITE 300 RADNOR PA 19087 SC 13G 1 w48611asc13g.txt SCHEDULE 13G