In order to compare HO-1+ cell accumulation in fast-growing AT-1 tumors (day 10) and slow-growing G tumors (day 49) of similar sizes (mean tumor weight +/- SD: 49 +/- 21 mg and 48 +/- 33 mg, respectively), we excluded some of the smallest G tumors and largest AT-1 tumors in our dataset. This evidence concerns the gene HMOX1 and neoplasm.