Stoner was initially diagnosed with anaemia and an inflammation of the stomach lining. Stoner later disputed the diagnosis, however, and, after continuing to struggle with the condition, he announced on 10 August 2009 that he would miss rounds 11, 12 and 13 in Brno, Indianapolis and Misano, respectively, in an attempt to recover from the illness, he was subsequently diagnosed as lactose intolerant. Mika Kallio was chosen as Stoner's replacement for the three races. Stoner returned to racing late in the 2009 season, placing second in the Portuguese Grand Prix and an emphatic first in the Australian Grand Prix, which he led throughout. At interview following the Australian Grand Prix, Stoner said that he experienced none of the premature tiredness that had dogged him earlier in the 2009 season. He followed this up with another first place in the wet at the Malaysian Grand Prix. At the last round of 2009 at Valencia, Stoner dominated all practice and qualifying sessions to take pole, only to crash on cold tyres on the warm-up lap and miss the race. Stoner ended the season with four victories, and eight podiums in total, leading to a fourth-place finish in the riders' championship.