I have a question regarding the use of rma.mv (metafor) in a multivariate
In particular, I have outcomes that vary not only between trials but also
between subjects. In other words, there are outcomes that have been measured
twice in one subject using different methods (mRNA, protein). This is true
for only a few studies, while others only report one method.
Hereby, I would like to deal with it?
So far, I have one random variable 'trial'.