May 8 (SeeNews) - Insurer Croatia Osiguranje [ZSE:CROS, CROS2], part of diversified holding group Adris [ZSE:ADRS, ADRS2], said on Wednesday that its unit Croatia Poliklinika has acquired 100% of Poliklinika Marin Med, the largest privately owned polyclinic in Dubrovnik, as part of its expansion drive.