Corrigendum: A Detailed View of KIR Haplotype Structures and Gene Families as Provided by a New Motif-Based Multiple Sequence Alignment - Roe, David; Vierra-Green, Cynthia; Pyo, Chul-Woo; Geraghty, Daniel E.; Spellman, Stephen R.; Maiers, Martin; Kuang, Rui (Frontiers in Immunology, 2021)