 On one day during his treatments , as his wife was wheeling him down a hospital corridor , Cullen went into cardiac arrest , requiring doctors to use a defibrillator to revive him . He underwent a bone marrow transplant that briefly reduced his immune system to the point that he could have very little human contact . Another examination in April 1998 revealed that the cancer was finally gone , and Cullen immediately began training for a comeback . 
 On one day during his treatments , as his wife was wheeling him down a hospital corridor , Cullen went into cardiac arrest , requiring doctors to use a defibrillator to revive him . He underwent a bone marrow transplant <a href='null_relcl' title='1'><mark>that</mark></a>briefly reduced his immune system to the point that he could have very little human contact . Another examination in April 1998 revealed that the cancer was finally gone , and Cullen immediately began training for a comeback . 
On one day during his treatments , as his wife was wheeling him down a hospital corridor , Cullen went into cardiac arrest , requiring doctors to use a defibrillator to revive em . He underwent a bone marrow transplant briefly reduced his immune system to da point dat he could have very lil human txt . Another examination in April 1998 revealed that the cancer was finally gone , and Cullen immediately began training for a comeback .