Interventions to improve reproductive outcomes in women with elevated natural killer cells undergoing assisted reproduction techniques: a systematic review of literature - Polanski, L. T.; Barbosa, M. A. P.; Martins, Wellington de Paula; Baumgarten, M. N.; Campbell, B.; Brosens, J.; Quenby, S.; Raine-Fenning, N. (Human Reproduction, 2014)