Description  Claims  Drawing  Cited references 

US6074657A   [0005] 
WO9420505A   [0006]  [0019] 
US5079007A   [0006] 
US4902683A   [0006] 
WO9841207A   [0008] 
US5563155A   [0021] 

Veterinary Pharmaceuticals and Biologicals   [0021]