The catheter comprises a catheter tube formed of two superposed tubular layers of materials which differ from one another. A tubular mediator layer is arranged between the layers to provide an adhesive anchorage for the layers.

 
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< S-(.alpha., .alpha.'-disubstituted-.alpha.''-acetic acid) substituted dithiocarbonate derivatives for controlled radical polymerizations, process and polymers made therefrom

> Intercalation-mediated synthesis of polymers
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