The Winter Paralympics began in 1976 in Örnsköldsvik, Sweden. Those Games were the first Paralympics (Summer or Winter) that featured athletes other than wheelchair athletes. The Games have expanded and grown to be (along with the Summer Games) part of the largest international sporting event after the Olympic Games. Given their expansion, the need for a very specific classification system has arisen. This system has also given rise to controversy and opened the door for cheating. Winter Paralympians have also been convicted of steroid use and other forms of cheating unique to Paralympic athletes, which has tainted the integrity of the Games.