Kalex Moto2 rider Jonas Folger of Germany rides during a free practice session at the Twin Ring Motegi circuit ahead of Sunday's Japanese Grand Prix in Motegi, north of Tokyo, Japan, October 10, 2015. REUTERS/Issei Kato Picture Supplied by Action Images
(Reuters) - A mystery illness that has forced German MotoGP rookie Jonas Folger to miss the season's last four races has been diagnosed as a genetic disorder, the rider's Tech3 Yamaha team said on Thursday.
Tests in Germany had revealed a strain of Gilbert Syndrome, which affects between two and five percent of the population and means the liver cannot process toxins effectively.
