 Complete the following phrase:  Erikssons longest-running mixed doubles partnership is with Anna Hasselborg, with whom he began curling at Härnosands gymnasium. The pair went on to compete in the Swedish Mixed Doubles Curling Championship four times, winning the event each time that they entered 2013, 2016, 2017, and 2019. Despite Hasselborg and Erikssons victories, longtime mixed doubles specialists Per Noreen and Camilla Noreen were selected to represent Sweden in the World Mixed Doubles Curling Championships in 2016 and 