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(Cell Systems 6, 25–36; January 24, 2018)
Owing to an oversight when proofreading this article, the authors added a citation without appropriately modifying the corresponding sentence in the text. The original sentence read, “In single cells, proof-of-principle approaches based on proximity ligation assays and DNA-tagged antibody sequencing indicate that RNA-to-protein correlations are typically poor, but such measurements are challenging and are restricted to few cells in suspension.” It has been corrected to now read, “In single cells, proof-of-principle approaches based on proximity ligation assays and DNA-tagged antibody sequencing indicate that RNA-to-protein correlations are typically poor, but such measurements can be challenging and are restricted to cells in suspension.”