For this reason, fighters often employ cutmen, whose job is to treat cuts between rounds so that the boxer is able to continue despite the cut. Variants Other scoring systems have also been used in various locations, including the five-point must system (in which the winning fighter is awarded five points, the loser four or fewer), the one-point system (in which the winning fighter is awarded one or more points, and the losing fighter is awarded zero), and the rounds system which simply awards the round to the winning fighter. In the rounds system, the bout is won by the fighter determined to have won more rounds. This system often used a supplemental points system (generally the 10-point must) in the case of even rounds. Championships In the first part of the 20th century, the United States became the centre for professional boxing. It was generally accepted that the "world champions" were those listed by the Police Gazette. After 1920, the National Boxing Association (NBA) began to sanction "title fights". Also during that time, The Ring was founded, and it listed champions and awarded championship belts. The NBA was renamed in 1962 and became the World Boxing Association (WBA). The following year, a rival body, the World Boxing Council (WBC) was formed. In 1983, the International Boxing Federation (IBF) was formed. In 1988, another world sanctioning body, the World Boxing Organization (WBO) was formed. In the 2010s a boxer had to be recognised by these four bodies to be the undisputed world champion; minor bodies like the International Boxing Organization (IBO) and World Boxing Union (WBU) are disregarded. Regional sanctioning bodies such as the North American Boxing Federation (NABF), the North American Boxing Council (NABC) and the United States Boxing Association (USBA) also awarded championships. The Ring magazine also continued listing the world champion of each weight division, and its rankings continue to be appreciated by fans. Major sanctioning bodies International Boxing Federation (IBF) World Boxing Association (WBA) World Boxing Council (WBC) World Boxing Organization (WBO) Citations Combat sports: Professional boxing championship rules; Government of Ontario. (2016, June 28). Retrieved November 11, 2018 Did Lennox Lewis Beat Evander Holyfield?: Methods for Analysing Small Sample Interrater Agreement Problems; Herbert K. H. Lee, Cork, D., & Algranati, D. (2002). Journal of the Royal Statistical Society. Series D (The Statistician), 51(2), pp. 129–146. Rules for IBF, USBA & Intercontinental Championship and Elimination Bouts;