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Dear all, I have two questions on SAS PROC NLMIXED. 1. Does PROC NLMIXED allow random slopes in a mixed model? I think it does from reading its documentation but am not totally sure. 2. Can anyone send me a pointer to documentation on how to allow random slopes in a mixed model using SAS PROC NLMIXED? I find the SAS online documentation not clear enough on how it can be done. I have found on the web some examples for fitting mixed models with random intercept(s) but not slopes. Many thanks in advance. Edmond