%0 Journal Article %@ 2369-2960 %I JMIR Publications %V 7 %N 4 %P e30017 %T Correction: Predicting Age Groups of Reddit Users Based on Posting Behavior and Metadata: Classification Model Development and Validation %A Chew,Robert %A Kery,Caroline %A Baum,Laura %A Bukowski,Thomas %A Kim,Annice %A Navarro,Mario %+ Center for Data Science, RTI International, 3040 East Cornwallis Road, Research Triangle Park, NC, 27709, United States, 1 9195415823, rchew@rti.org %D 2021 %7 30.4.2021 %9 Corrigenda and Addenda %J JMIR Public Health Surveill %G English %X %M 33929969 %R 10.2196/30017 %U https://publichealth.jmir.org/2021/4/e30017 %U https://doi.org/10.2196/30017 %U http://www.ncbi.nlm.nih.gov/pubmed/33929969