Erratum

For the article cited above, the authors would like to provide corrected information from two sections of the published paper.

In Figure 2, labels for “current” and “past” smokers should be swapped. Therefore, in the section “Risk factors from the questionnaire in relation to SCC” of the text, “current smokers” should be replaced by “past smokers.”

In Table III, P-values for the variable “Time since transplantation” for alpha HPV types are incorrect (they should be between 0 and 1), and the correct values are:

HPV2: P-value trend = 0.5

HPV27: P-value trend = 0.6

HPV7: P-value trend = 0.4

HPV16: P-value trend = 0.9

HPV6: P-value trend = 0.8

HPV13: P-value trend = 0.7

The authors apologize for any confusion to readers.