[1] Leibniz Inst Zoo & Wildlife Res, Alfred Kowalke Str 17, D-10315 Berlin, Germany
[2] Zoo Salzburg, Hellbrunner Str 60, A-5081 Anif, Austria
[3] Tierarztl Klin Gessertshausen, Grasweg 2, D-86459 Gessertshausen, Germany
[4] Zooparc Beauval & Beauval Nat, F-41110 Saint Aignan, France
[5] Parc Zool Amneville, F-57360 Amneville Les Thermes, France
[6] West Midland Safari & Leisure Pk, Bewdley DY12 1LF, Worcs, England
[7] Pairi Daiza, B-7940 Brugelette, Belgium