VDJdb: a curated database of T-cell receptor sequences with known antigen specificity. - Mikhail Shugay; Dmitriy V. Bagaev; Ivan V. Zvyagin; Renske M. A. Vroomans; Jeremy Chase Crawford; Garry Dolton; Ekaterina Komech; Anastasiya L. Sycheva; Anna E. Koneva; Evgeniy S. Egorov; Alexey V. Eliseev; Ewald van Dyk; et al. (Nucleic Acids Res., 2018)