CTdatabase: a knowledge-base of high-throughput and curated data on cancer-testis antigens. - Luiz Gonzaga Almeida; Noboru J. Sakabe; Alice R. de Oliveira; Maria Cristina C. Silva; Alex S. Mundstein; Tzeela Cohen; Yao-Tseng Chen; Ramon Chua; Sita Gurung; Sacha Gnjatic; Achim A. Jungbluth; Otavia L. Caballero; et al. (Nucleic Acids Res., 2009)