DOI:
10.1055/s-00000012
Endoscopy
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References
Royston P, Sauerbrei W.
Multivariable model-building. A pragmatic approach to regression analysis based on fractional polynomials for modelling continuous variables.
Chichester, UK: Wiley-Blackwell; 2008.
ISBN: 978-0-470-02842-1
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