Amalie B. Nielsen, Mi Zhou, Adam J. de Smith, Rong Wang, Lucie McCoy, Helen Hansen, Libby Morimoto, Kirsten Grønbæk, Christoffer Johansen, Scott C. Kogan, Catherine Metayer, Paige M. Bracci, Xiaomei Ma, Joseph L. Wiemels. Increased neonatal level of arginase 2 in cases of childhood acute lymphoblastic leukemia implicates immunosuppression in the etiology. Haematologica 2019;104(11):e514-e516; https://doi.org/10.3324/haematol.2019.216465.