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Daniel W. Kern. Acne scar treatments. Inačica izvorne stranice arhivirana 22. srpnja 2010. Pristupljeno 6. siječnja 2010. - članak u kome se navode približni troškovi nekih vrsti liječenja
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Daniel W. Kern. Acne scar treatments. Inačica izvorne stranice arhivirana 22. srpnja 2010. Pristupljeno 6. siječnja 2010. - članak u kome se navode približni troškovi nekih vrsti liječenja