Hayden-Pawson, C., Curti, M., Maiolino, R., Cirasuolo, M., Belfiore, F., Cappellari, M., Concas, A., Cresci, G., Cullen, F., Kobayashi, C., Mannucci, F., Marconi, A., Meneghetti, M., Mercurio, A., Peng, Y., Swinbank, M., & Vincenzo, F. (in press). The KLEVER survey: Nitrogen abundances at z ∼2 and probing the existence of a fundamental nitrogen relation. Monthly Notices of the Royal Astronomical Society, Article stac584. https://doi.org/10.1093/mnras/stac584