RT Journal Article SR Electronic T1 Platelet-rich plasma: any substance into it? JF British Journal of Sports Medicine JO Br J Sports Med FD BMJ Publishing Group Ltd and British Association of Sport and Exercise Medicine SP 618 OP 619 DO 10.1136/bjsm.2009.067108 VO 44 IS 9 A1 Mei-Dan, O A1 Mann, G A1 Maffulli, N YR 2010 UL http://bjsm.bmj.com/content/44/9/618.abstract AB