RT Article T1 Fractures in elderly Americans associated with walking leashed dogs JF JAMA surgery A1 Pirruccio, Kevin A2 Ahn, Jaimo A2 Yoon, Yeo Myoung LA English YR 2019 UL https://krimdok.uni-tuebingen.de/Record/1912562030 DO 10.1001/jamasurg.2019.0061