RT Journal Article SR Electronic T1 Long-term health issues in ultraendurance runners: should we be concerned? JF BMJ Open Sport & Exercise Medicine JO BMJ OPEN SP EX MED FD BMJ Publishing Group Ltd SP e001131 DO 10.1136/bmjsem-2021-001131 VO 7 IS 3 A1 Volker Scheer A1 Daniel Rojas-Valverde YR 2021 UL http://bmjopensem.bmj.com/content/7/3/e001131.abstract AB