31.   He was hospitalized briefly with a dislocated knee joint, and was unlikely to continue in the competition, said Valerie McKenzie, a spokeswoman for the organizing committee.

32.   In the operation, doctors were removing some tissue in the knee joint.

33.   The chronic inflamation has weakened his knee joints, leaving him unable to walk without a cane.

34.   The chronic inflammation has weakened his knee joints, leaving him unable to walk without a cane.

35.   The gymnast dislocated a knee joint and was hospitalized briefly, said Valerie McKenzie, a spokeswoman for the organizing committee.

36.   The knee joint was like that of dinosaurs and humans, hinged so the lower leg swung forward freely.