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Equivalent of covariance pattern model with a heterogeneous compound symmetric

Pardis Miri 
Hi everyone,

I am trying to figure out how to replicate the results I've gotten from SPSS when using the Repeated Covariance Type : Compound Symmetry: Heterogeneous.  Can anyone help me figure this out?
So far I know the following does't produce the same results.

comsym <- gls(SC_slope~Bodysite+Pattern+Strength,data = df.na.removed.,
                   correlation=corCompSymm(form = ~ 1 |id), method="REML", na.action = na.omit)

summary(comsym)

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Pardis Miri Equivalent of covariance pattern model with a heterogeneous compound symmetric May 29 Ben Pelzer Equivalent of covariance pattern model with a heterogeneous compound symmetric May 30 Pardis Miri Equivalent of covariance pattern model with a heterogeneous compound symmetric May 30 Ben Pelzer Equivalent of covariance pattern model with a heterogeneous compound symmetric May 30