Harkonen, T Mass mortality in harbour seals and harbour porpoises caused by an unknown pathogen. [electronic resource] - The Veterinary record Apr 2008 - 555-6 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 0042-4900 Standard No.: 10.1136/vr.162.17.555 doi Subjects--Topical Terms: AnimalsDenmark--epidemiologyDisease Outbreaks--veterinaryLung--pathologyMediastinal Emphysema--mortalityPhocaPolymerase Chain ReactionPorpoisesPulmonary Emphysema--mortalityRespiratory Tract Infections--mortalitySweden--epidemiologyVirus Diseases--mortality