[1] Univ Tubingen, Dept Psychiat & Psychotherapy, D-72076 Tubingen, Germany
[2] Univ Tubingen, Geriatr Ctr, D-72074 Tubingen, Germany
[3] Univ Tubingen, Sect Expt Radiol, D-72074 Tubingen, Germany
[4] Univ Tubingen, Dept Endocrinol Metab & Pathobiochem, D-72074 Tubingen, Germany
[5] Univ Tubingen, Dept Sports Med, D-72074 Tubingen, Germany