Retraction Note: sFRP2 in the aged microenvironment drives melanoma metastasis and therapy resistance - Amanpreet Kaur; Marie R. Webster; Katie Marchbank; Reeti Behera; Abibatou Ndoye; Curtis H. Kugel; Vanessa M. Dang; Jessica Appleton; Michael P. O’Connell; Phil Cheng; Alexander A. Valiga; Rachel Morissette; et al. (Nature, 2025)