Antonsson L, Boketoft A, Garzino-Demo A, Olde B, Owman C. Molecular mapping of epitopes for interaction of HIV-1 as well as natural ligands with the chemokine receptors, CCR5 and CXCR4. AIDS. 2003 Dec 05;17(18):2571–9. doi: 10.1097/00002030-200312050-00004. PMID: 14685051.