41.   Diego Maradona, temporarily suspended for failing a doping test, unexpectedly showed up for training with his team Boca Juniors on Saturday.

42.   Diego Maradona, dogged by rumors of a new failed doping test, said Wednesday he had decided to retire from soccer, again.

43.   Doping tests led to the fifth expulsion from these games of an athlete from the former Soviet Union.

44.   During the period of the ban, Li will be required to submit to four doping tests.

45.   Egorova became the first person to fail a doping test at the World Nordic Championships, costing her a gold medal and further competition.

46.   EPO is a synthetic hormone that stimulates the production of oxygen-carrying red blood cells and cannot be detected by existing doping tests.

47.   EPO, difficult to detect in doping tests, increases the capacity of red blood cells to retain oxygen.

48.   For the purposes of doping tests, urine samples submitted by athletes are split into A and B samples.

49.   Former Olympic and world hurdles champion Ludmila Engquist said Sunday that she flunked a doping test and will not compete as a bobsledder in the Winter Olympics.

50.   Former Olympic hurdles champion turned bobsledder Ludmila Engquist on Monday was banned from her new sport for two years after failing a doping test.