S. . Kara and M. . Karakok, “Investigation of GREMLIN 1, COL15A1 immunoreactivity and the relationship between microvessel density and GREMLIN 1 in papillary renal cell carcinoma and chromophobe renal cell carcinoma”, Med Sci Discov, vol. 3, no. 4, pp. 184–191, Apr. 2016.