COLLAGEN AESTHETICS, INC. VALUATION AND QUALIFYING ACCOUNTS Years Ended June 30, 1999, 1998, 1997 Additions Balance of charged to beginning of costs and Balance at Description period expenses Deductions end of period (in thousands) 1999 Allowance for doubtful accounts.......... $505 $ 56 $122 $439 1998 Allowance for doubtful accounts.......... $418 $169 $ 82 $505 1997 Allowance for doubtful accounts.......... $375 $ 71 $ 28 $418