Exhibit 1
                                                                       ---------


                   List of transactions in the Company Common Stock
                   ------------------------------------------------

                                                   Amount     Amount
                 Person                              of         of       Approximate
                effecting                          Shares     Shares      Price per
 Date          transaction          Security       Bought      Sold         Share
-------     -----------------     ------------     ------     ------     -----------
                                                               
5/08/02     Oracle Associates     Common Stock      4,000                  25.1975
5/08/02     Oracle Associates     Common Stock     14,900                  25.1975
5/09/02     Oracle Associates     Common Stock        800                  24.5500
5/09/02     Oracle Associates     Common Stock      3,000                  24.5500
5/31/02     Oracle Associates     Common Stock      5,000                  22.4289
5/31/02     Oracle Associates     Common Stock     21,800                  22.4289
6/12/02     Oracle Associates     Common Stock      5,100                  19.6019
6/12/02     Oracle Associates     Common Stock     20,000                  19.6019
6/14/02     Oracle Associates     Common Stock      2,600                  20.6810
6/14/02     Oracle Associates     Common Stock     10,300                  20.6810
6/26/02     Oracle Associates     Common Stock      2,600                  19.4698
6/26/02     Oracle Associates     Common Stock     10,000                  19.4698
6/28/02     Oracle Associates     Common Stock      4,200                  21.2100
6/28/02     Oracle Associates     Common Stock     13,500                  21.6947
6/28/02     Oracle Associates     Common Stock      4,000                  21.2340
6/28/02     Oracle Associates     Common Stock     16,500                  21.2100
6/28/02     Oracle Associates     Common Stock      3,500                  21.6947
6/28/02     Oracle Associates     Common Stock     15,400                  21.2340
7/02/02     Oracle Associates     Common Stock      4,000                  20.2310
7/02/02     Oracle Associates     Common Stock     16,000                  20.2310






5/08/02     Oracle Investment     Common Stock      1,100                  25.1975
               Management
5/09/02     Oracle Investment     Common Stock        200                  24.5500
               Management
5/31/02     Oracle Investment     Common Stock        400                  22.4289
               Management
6/12/02     Oracle Investment     Common Stock      2,800                  19.6019
               Management
6/12/02     Oracle Investment     Common Stock      1,600                  19.6019
               Management
6/14/02     Oracle Investment     Common Stock      1,500                  20.6810
               Management
6/14/02     Oracle Investment     Common Stock        800                  20.6810
               Management
6/26/02     Oracle Investment     Common Stock      1,400                  19.4698
               Management
6/26/02     Oracle Investment     Common Stock        800                  19.4698
               Management
6/28/02     Oracle Investment     Common Stock      1,200                  21.2340
               Management
6/28/02     Oracle Investment     Common Stock      1,900                  21.6947
               Management
6/28/02     Oracle Investment     Common Stock      1,100                  21.6947
               Management
6/28/02     Oracle Investment     Common Stock      1,300                  21.2100
               Management
7/02/02     Oracle Investment     Common Stock      1,500                  20.2310
               Management