TY - JOUR KW - Antibodies KW - Complement Fixation Tests KW - Down Syndrome KW - Hepatitis A KW - Hepatitis B virus KW - Humans KW - Immunodiffusion KW - leprosy KW - Mexico AU - Salazar M-allén M AU - Escobar A AU - Somolinos Palencia J BT - Revista de investigacion en salud publica C1 - http://www.ncbi.nlm.nih.gov/pubmed/4249777?dopt=Abstract DA - 1970 Jul-Sep IS - 3 J2 - Rev Invest Salud Publica LA - spa PY - 1970 SP - 189 EP - 96 T2 - Revista de investigacion en salud publica TI - [Study of the Australia factor among the population of Mexico City]. VL - 30 SN - 0034-8384 ER -