Mason BL, Minhajuddin A, Czysz AH, Jha MK, Gadad BS, Mayes TL, Trivedi MH. Fibroblast growth factor 21 (FGF21) is increased in MDD and interacts with body mass index (BMI) to affect depression trajectory. Translational Psychiatry. 2022 Jan 11;12(1):16. doi: 10.1038/s41398-021-01679-y.