Feldman, S Clonidine--a horse or an ass? [electronic resource] - Anaesthesia Dec 1991 - 1003-4 p. digital Publication Type: Editorial ISSN: 0003-2409 Standard No.: 10.1111/j.1365-2044.1991.tb09908.x doi Subjects--Topical Terms: AnesthesiaClonidine--pharmacologyDrug SynergismHumans