@article{article2e111907,
title   = {Long-term storage of igg and igm on filter paper for use in parasitic disease soroepidemiology surveys},
author = {Guimaraes, M C S and Castilho, E A and Celeste, B J and Nakahara, O S and Amato Neto, Vicente},
year = {1985},
journal   = {Bullettin Pan American Health Organization}
}