Martha Wetzel

4 weeks ago | medrxiv.org | Martha Wetzel |David Howard |Nicholas Giordano |Stephen Patrick

The authors have declared no competing interest. The HRS (Health and Retirement Study) is sponsored by the National Institute on Aging (grant number NIA U01AG009740) and is conducted by the University of Michigan. This research was funded in part by NIDA grant 5T32DA050552. The results and opinions expressed therein represent those of the authors and do not necessarily reflect those of NIH or NIDA.