Correction: Multimorbidity and overall survival among women with breast cancer: results from the South African Breast Cancer and HIV Outcomes Study oleh Oluwatosin A. Ayeni, Maureen Jofe, Witness Mapanga, Wenlong Carl Chen, Daniel S. O’Neil, Boitumelo Phakathi, Sarah Nietz, Ines Buccimazza, Sharon Čačala, Laura W. Stopforth, Judith S. Jacobson, Katherine D. Crew, Alfred I. Neugut, Duvern Ramiah, Paul Ruf, Herbert Cubasch, Tobias Chirwa, Valerie McCormack, Lisa K. Micklesfeld, Shane A. Norris