Boff, D., D. S. Lunkes, A. Kunzler, and J. I. Rohr. “Prevalence of Positive VDRL in Donors of the Blood Center in Cruz Alta Municipality, Brazil, from 2003 to 2009”. Revista De Patologia Tropical / Journal of Tropical Pathology, vol. 40, no. 2, July 2011, pp. 179-84, doi:10.5216/rpt.v40i2.14943.