TF and squamous cell carcinoma: As representatively shown in Figure 1, we found TF expression in 4 out of 4 (100%) of the squamous carcinomas (i.e., one 4+, two 2+, and one 1+) and 4 out of 4 (100%) of the adenocarcinomas (i.e., one 3+, one 2+, and two 1+).