[1] Mayo Clin, Rochester, MN USA
[2] Roswell Pk Canc Inst, Buffalo, NY 14263 USA
[3] North Cent Canc Treatment Grp, Rochester, MN USA
[4] Carle Clin Associates, Urbana, IL USA
[5] Metro Minnesota Community Clin Oncol Project, St Louis Pk, MN USA
[6] NCCTG, Rochester, MN USA
[7] Mayo Clin, Scottsdale, AZ USA