Modelling time-varying effects in Cox model under order restrictions

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idea of Grambsch and Therneau, where smoothing the Schoenfe1d residua1s p1otted against time revea1 the shape of the under1ined φ(t) function, we use.
Salanti, Ulm: Modelling time-varying effects in Cox model under order restrictions Sonderforschungsbereich 386, Paper 319 (2003) Online unter: http://epub.ub.uni-muenchen.de/

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