[R] inverse gaussian distribution of frailty variable

[emanuela001@interfree.it]

Hello,

I'm Emanuela, I'm implemented a survival analysis and I'm trying to use a frailty model with inverse gaussian distribution, but I'm not able to find the right code, because it seems to be only a gamma and a gaussian distribution. Is there also the inverse gaussian distribution? 

Thanks a lot

Emanuela Rossi

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