Dear forum members, Could you please help me confirm if there is a problem with
the experimental design? There are two initial groups (vitamin D deficient and
normal group). Then, the D deficient group has two treatments (with a low D dosage
and a high D dosage), while the normal group has only one treatment (maintenance
therapy). 
Initially, I thought it might be a nested design (treatment
nested within groups, where the treatment is a fixed effect, and groups and treatment
nested in groups are random effects. However, I do not think it is a correct
design as the groups did not include the same treatments. Am I correct?
I see only one solution where we will have only one or two
groups and the same treatments should apply to each of them. Are there other
solutions?Thanks,Julia

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