20 years after the study “Long-term meditators self-induce high-amplitude gamma synchrony during mental practice” (part 4) – where do we find a confirmation of this study by a second group?

https://www.pnas.org/doi/full/10.1073/pnas.0407401101 Richard Davidson mentioned one scientific study which confirmed the findings of the PNAS paper from 2004, but Peter Gamma from www.petergamma.org does not know which scientific study this was. A second paper about meditation which uses a different protocol: Found gamma wave activity during mental practice at a different location in the brain. In …