Cathepsin K is present in invasive oral tongue squamous cell carcinoma in vivo and in vitro. - Bitu CC; Kauppila JH; Bufalino A; Nurmenniemi S; Teppo S; Keinänen M; Vilen ST; Lehenkari P; Nyberg P; Coletta RD; Salo T (PloS one, 2013)