Wollert Wollert KC KC Kempf Kempf T T Giannitsis Giannitsis E E Bertsch Bertsch T T Braun Braun SL SL Maier Maier H H et al et al An Automated Assay for Growth Differentiation Factor 15 An Automated Assay for Growth Differentiation Factor 15 J Appl Lab Med An AACC Publ J Appl Lab Med An AACC Publ 2017 2017 1 1 5 5 510 510 521 521. Here, GDF15 is linked to keratoconus.