( 1 ) includes the following plans : 1986 combination stock option plan ; amended and restated 1990 non- employee director stock option plan ; 1995 combination stock option plan ; amended and restated 1999 equity incentive plan ; and 2000 employee stock purchase plan . also includes the following plans which we assumed in connection with our acquisition of fluoroscan imaging systems in 1996 : fluoroscan imaging systems , inc