1991

• Z, Duarte, P, Morera and PN, Vuong. (1991, ). Abdominal angiostrongylosis in Nicaragua: a clínico-pathological study on a series of 12 case reports Ann Parasitolol Humaine et Comparé 66, 6: 259-262. [More]
• LA, Larsen, MW, Oberle, JM, Sánchez-Braverman, L, Rosero-Bixby and KM, Vetter. (1991, ). A population-based Serosurveillance of Syphilis in Costa Rica Sexaully and Transmitted Diseases 18, 2: 124-128. [More]
• L, Rosero-Bixby. (1991, ). Premarital sex in Costa Rica: incidence, trends and determinants International Familiy Planning Perspectives 17, 1: 25-29. [More]
• L, Rosero-Bixby. (1991, ). Actividad sexual prematrimonial en Costa Rica: incidencia, tendencias y determinantes International Familiy Planning Perspectives 17, 1: 24-28. [More]
• MD, Shelby, GA, Gutierrez-Espeleta, WM, Generoso and AF, McFee. (1991, ). Mouse determinant lethal and bone marrow micronucleus studies on methyl vinyl sulfone and divinyl sulfone Mutat Res: 431-437. [More]
• L, Rosero-Bixby. (1991, ). Socioeconomic development, health interventions and mortality decline in Costa Rica Scand J Soc Med Supp 46, 2: 33-42. [More]
• A, Hanson L., F, Jalil, R, Ashraf, B, Bernini, B, Carlsson and et Al Cruz J.R. "Characteristics of human milk antibodies and their effect in relation to the epidemiology of breast-feeding and infections in a developing country". New York : Plenum Press, 1991. 1-15. [More]
• R, Sierra, H, Ohshima, n}oz N Mu{\, S, Teuchmann, n}a A. S Pe{\ and et Al Malaveille C. "Exposure to N-nitrosamines and other risk factors for gastric cáncer in Costa Rica children". Lyon : IARC Scientifc Publications, 1991. 162-167. [More]

1990

• K, Irwin, M, Oberle and L, Rosero. (1990, ). Estudios de detección selectiva del cáncer de cérvix y del cáncer de mama en Costa Rica Bol Of Sanit Panam 109, 3: 213-224. [More]
• KM, Vetter, RC, Barnes, MW, Oberle, L, Rosero-Bixby and J, Schachter. (1990, ). Seroepidemiology of Chlamydia in Costa Rica Genitourin Med 66, 3: 182-188. [More]
• R, Barrantes, P, Smouse, H, Mohrenweiser, H, Gershowitz, J, Azofeifa and T, Arias. (1990, ). Microevolution in lower Central America: Genetic characterization of the Chibcha-speaking groups of Costa Rica and Panama, and a consensus taxonomy based on genetic and linguistic affinity Am J Hum Genet 46, 1: 63-48. [More]
• R, Khabbaz, T, Hartley, M, Oberle and L, Rosero-Bixby. (1990, ). Seroprevalence of human T-Lymphotropic virus type I (HTLV-I) in Costa Rica AIDS Res Hum Retroviruses 6, 7: 959-960. [More]
• W, Marsh, D, Hentges, J, Chavarría, W, Thal, M, Adams and R, Achí. (1990, ). Influence of orally adiministered antibiotics on faecal pH and Volatile Fatty Acid concentrations on infants and young children Microbial Ecology in Health and Disease 3, 1: 7-13. [More]
• L, Mata. (1990, ). Infection, malnutrition and growth J Gastroenterol Hepatol 5, 1: 32-43. [More]
• L, Mata, C, Albertazzi and L, Marranghello. (1990, ). AIDS in Costa Rica: Estimates for 1990-1994 by the quadratic and other simple equations Interciencia 15, 5: 287-292. [More]
• R, Barrantes. (1990, ). Una hipótesis evolutiva sobre la ausencia del antígeno (Di-a) en Amerindios chibchas Rev Biol Trop 38, 2: 277-282. [More]
• L, Mata, G, Abarca, R, Víquez and L, Marranghello. (1990, ). Intoxicación paralítica por mariscos (IPM) por Spondylus calcifer contaminado con Pirodinium bahamense, Costa Rica, 1989-1990 Rev Biol Trop 38, 1: 129-136. [More]
• MW, Oberle, L, Rosero-Bixby and S, Mekbel-Achit. (1990, ). Confirmación histological del diagnóstico de cáncer cervico-uterino en Costa Rica, 1982-1984 Acta Med Costarric: 94-98. [More]
• MW, Oberle, L, Rosero-Bixby and S, Larsen. (1990, ). Prevalencia de enfermedades de transmisión sexual en las mujeres de Costa Rica Rev Cost Cienc Med 11, 2: 44-55. [More]
• P, Morera and M, Conejo. (1990, ). Abdominal Angiostrongylosis: a problema of public health Bull Soc Francaise Parasitologie VIII 21, 2: 401 https://doi.org/https://doi.org/10.1590/s0037-86821988000200012. [More]
• P, Morera and M, Conejo. (1990, ). Chronic Strongyloidosis: an underestimated problem Bull Soc Francaise Parasitologie VIII: 400. [More]
• L, Rosero-Bixby. (1990, ). Socioeconomic development, health interventions and mortality decline in Costa Rica Scan J Soc Med 46, 2: 33-42. [More]
• L, Rosero-Bixby, C, Grimaldo and C, Raabe. (1990, ). Monitoring a primary health care program with lot quality assurance sampling: Costa Rica, 1987 Health Policy and Planning 5, 1: 30-39. [More]
• L, Mata. "Breast-feeding, infections and infant outcomes: an international perspective". Newfoundland, Canadá : ARTS Biomedical, 1990. 1-23. [More]

1989

• W, Brenes. (1989, ). Epidemiología de la caries dental en poblaciones amerindias en transición sociocultural Vínculos 15: 45-57. [More]