Prospectus regarding Straumann Holding AG's public offer to the shareholders and warrant holders of Biora AB (publ)

This press announcement is a translation from the Swedish language. In the event of any discrepancy between the Swedish version and the English version, the Swedish version shall prevail. This press release may not be released, published or distributed, directly or indirectly, in or into the United States, Australia, Canada or Japan. Prospectus regarding Straumann Holding AG's public offer to the shareholders and warrant holders of Biora AB (publ) Straumann Holding AG has prepared a prospectus regarding its public offer to the shareholders and holders of warrants of series 2001/2004 of Biora AB (publ), which was made public on 7 April 2003, (the "Offer"). The prospectus will be held available from 29 April 2003 at the offices of Mangold Fondkommission AB, Östermalmsgatan 87 B, SE-114 59 Stockholm, tel. (46)8-454 96 50, fax. (46)8-454 96 51, and at the offices of Linklaters Advokatbyrå AB, Strandvägen 7A, 114 84 Stockholm. The acceptance period commences on 29 April 2003 and ends on 20 May 2003. The prospectus will in connection with the commencement of the acceptance period be distributed to the shareholders and warrant holders registered in their own names as at 24 April 2003. For further information please contact: Straumann Holding AG Gilbert Achermann, CEO Tel:(41) 61 965 11 11 Deutsche Bank AG London Mikael Mannik, Vice President Nordic Corporate Finance Tel: (44) 207 545 7261 This announcement does not constitute an offer or invitation to exchange or sell or an offer to exchange or purchase any securities. The Offer is not being made, directly or indirectly, in or into the United States of America, Canada, Australia or Japan, and it may not be accepted in or from the United States, Australia, Canada or Japan. Copies of this press release and any related materials are not being and should not be mailed or otherwise distributed or sent in or into the United States of America, Canada, Australia or Japan. The Offer is furthermore not directed to persons whose participation in the offering requires that further offer documents are issued or that registration or other measures are taken, other than those required under Swedish law. No document relating to the Offer may be distributed in or into any country where such distribution or offering requires any of the aforementioned measures to be taken or would be in conflict with any law or regulation of such a country. In the event of such distribution or offering still being made, an acceptance form sent from such a country may be disregarded. - ENDS - ------------------------------------------------------------ This information was brought to you by Waymaker http://www.waymaker.net The following files are available for download: http://www.waymaker.net/bitonline/2003/04/28/20030427BIT00030/wkr0001.doc http://www.waymaker.net/bitonline/2003/04/28/20030427BIT00030/wkr0002.pdf