Viral oncoprotein antibodies as a marker for recurrence of Merkel cell carcinoma: A prospective validation study. - Paulson KG; Lewis CW; Redman MW; Simonson WT; Lisberg A; Ritter D; Morishima C; Hutchinson K; Mudgistratova L; Blom A; Iyer J; Moshiri AS; et al. (Cancer, 2017)