Regulatory T Cells Suppress T Cell Activation at the Pathologic Site of Human Visceral Leishmaniasis Rai, Ambak K. ; Thakur, Chandreshwar P. ; Singh, Amar ; Seth, Tulika ; Srivastava, Sandeep K. ; Singh, Pushpendra ; Mitra, Dipendra K. Abstract Publication: PLoS ONE Pub Date: February 2012 DOI: 10.1371/journal.pone.0031551 Bibcode: 2012PLoSO...731551R