Balter, V., da Costa, A. N., Bondanese, V. P., Jaouen, K., Lamboux, A., Sangrajrang, S., et al. (2015). Natural variations of copper and sulfur stable isotopes in blood of hepatocellular carcinoma patients. Proceedings of the National Academy of Sciences of the United States of America, 112(4), 982-985. doi:10.1073/pnas.1415151112.