Fig. 1From: COL5A1 gene variants previously associated with reduced soft tissue injury risk are associated with elite athlete status in rugby Allele frequency of COL5A1 rs12722 ( a ) and rs3196378 ( b ) for control and athlete groups. Asterisks indicate a difference in allele frequency between the particular athlete group and controls. A single asterisk (*) designates PÂ =Â 0.01 and a double asterisk (**) designates PÂ =Â 0.02. RU, rugby union, RL rugby league. Eight athletes competed in both elite RL and RU and were included in both groups that were analysed separately Back to article page