PLAC1, a trophoblast-specific cell surface protein, is expressed in a range of human tumors and elicits spontaneous antibody responses - Silva Júnior, Wilson Araújo da; Gnjatic, Sacha; Chua, Ramon; Cohen, Tzeela; Hsu, Melinda; Jungbluth, Achim A.; Altorki, Nasser K.; Chen, Yao-Tseng; Old, Lloyd J.; Simpson, Andrew J. G.; Caballero, Otavia L. (Cancer Immunity, 2007)