Koga denied taking the substances knowingly but admitted taking a diet of supplements which could have been to blame. He now faces a maximum ban of four years.
Kukors Smith alleged in the lawsuit, filed in Orange County Superior Court near Los Angeles, that Sean Hutchison, her coach at a swim club near Seattle, began grooming her for a sexual relationship at age 13.
Ledecky had opened her evening an hour earlier with a third-place finish in the 400m individual medley won by Melanie Margalis in 4:36.81.
Mekaal Rahim came second in the 250m race for boys while Jatnald Canaria finished runners-up place in the girl’s section.
The 25-year-old completed a butterfly hat-trick to become the most decorated Commonwealth Games swimmer of all time
Australia flexed their muscles on the Gold Coast with five more swimming gold medals, including a clean sweep in the women's 100m butterfly
The 25-year-old is blazing the comeback trail after taking a year out from the sport.
Aspetar has set up onsite facilities to offer a range of comprehensive medical services to all participating athletes
The team, comprising 17 males and six female swimmers between the ages of 14 and 16, is preparing for the FINA/HOSA Marathon Swim World Series 2018
Phelps said he reached rock bottom following the 2012 Olympics where he won four gold medals and two silver. For four days he remained in his room without food or sleep
The programme offers swimming, scuba diving and snorkelling lessons for differently abled people of all ages
Five-star show from Sarah Sjostrom at FINA/airweave World Cup
Le Clos, Morozov and Hosszu claim two gold medals each on the opening day at Hamad Aquatic Centre
Twelve swimmers, including Olympian Nada Mohammad Arakji, will compete for Qatar
The Olympic champion will be the main attraction at the FINA event