RT Journal Article SR Electronic T1 Relative age effect: beyond the youth phenomenon JF BMJ Open Sport & Exercise Medicine JO BMJ OPEN SP EX MED FD BMJ Publishing Group Ltd SP e000857 DO 10.1136/bmjsem-2020-000857 VO 6 IS 1 A1 Patrick Wakefield Joyner A1 John Lewis A1 William J Mallon A1 Don Kirkendall A1 Rehan Dawood A1 Austin Fagerberg A1 Frederic Baker Mills IV A1 William Garrett YR 2020 UL http://bmjopensem.bmj.com/content/6/1/e000857.abstract AB This article has been retracted