TY - JOUR AU - Natário, Isabel AU - Lucília Carvalho, M. TI - Addressing the problem of lack of representativeness on syndromic surveillance schemes JO - Discussiones Mathematicae. Probability and Statistics PY - 2009 SP - 169 EP - 183 VL - 29 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/DMPS_2009_29_2_a4/ LA - en ID - DMPS_2009_29_2_a4 ER -