Lower respiratory tract infectionsNARVAEZ PORRAS, O.Current therapeutic research. 1996, Vol 57, pp 36-40, issn 0011-393X, SUPAConference Paper

Lack of correlation of in vitro adherence of Haemophilus influenzae to epithelial cells with frequent occurrence of otitis mediaPORRAS, O; DILLON, H. C. JR; GRAY, B. M et al.Pediatric infectious disease. 1987, Vol 6, Num 1, pp 41-45, issn 0277-9730Article

Application of multilocus enzyme gel electrophoresis to Haemophilus influenzaePORRAS, O; CAUGANT, D. A; LAGERGARD, T et al.Infection and immunity. 1986, Vol 53, Num 1, pp 71-78, issn 0019-9567Article

Kinematics of the North American-Caribbean-Cocos plates in Central America from new GPS measurements across the Polochic-Motagua fault systemLYON-CAEN, H; BARRIER, E; LUNA, J et al.Geophysical research letters. 2006, Vol 33, Num 19, issn 0094-8276, L19309.1-L19309.5Article

Juvenile chronic arthritis in Costa Rica. A pilot referral studyARGUEDAS, O; PORRAS, O; FASTH, A et al.Clinical and experimental rheumatology (Testo stampato). 1995, Vol 13, Num 1, pp 119-123, issn 0392-856XArticle

Detection of soy protein in soy lecithin, margarine and, occasionally, soy oilPORRAS, O; CARLSSON, B; FALLSTROM, S. P et al.International archives of allergy and applied immunology. 1985, Vol 78, Num 1, pp 30-32, issn 0020-5915Article

Ataxia-telangiectasia: A primary immunodeficiency revisitedREGUEIRO, J. R; PORRAS, O; LAVIN, M et al.Immunology and allergy clinics of North America. 2000, Vol 20, Num 1, issn 0889-8561, xiii, 177-206 [31 p.]Article

Development of a Costa Rican version of the Childhood Health Assessment QuestionnaireARGUEDAS, O; ANDERSSON-GÄRE, B; FASTH, A et al.Journal of rheumatology. 1997, Vol 24, Num 11, pp 2233-2241, issn 0315-162XArticle

Difference in structure between type b and nontypable Haemophilus influenzae populationsPORRAS, O; CAUGANT, D. A; GRAY, B et al.Infection and immunity. 1986, Vol 53, Num 1, pp 79-89, issn 0019-9567Article

Visceral leishmaniasis in Costa Rica : First case reportCARRILLO, J; CHINCHILLA, M; VALVERDE, B et al.Clinical infectious diseases. 1999, Vol 29, Num 3, pp 678-679, issn 1058-4838Conference Paper

Ataxia-telangiectasia: Identification and detection of founder-effect mutations in the ATM gene in ethnic populationsTELATAR, M; TERAOKA, S; PORRAS, O et al.American journal of human genetics. 1998, Vol 62, Num 1, pp 86-97, issn 0002-9297Article

Detection of soy protein in soy lecithin, margarine and, occasionally, soy oil = Mise en évidence de protéines de soja dans de la lécithine, de la margarine et éventuellement, de l'huile de sojaPORRAS, O; CARLSSON, B; FALLSTROM, S. P et al.International archives of allergy and applied immunology. 1985, Vol 78, Num 1, pp 30-32, issn 0020-5915Article

Defence of mucous membranes by antibodies, receptor analogues and non-specific host factorsHANSON, L. Å; ANDERSSON, B; CARLSSON, B et al.Infection. 1984, Vol 12, Num 2, pp 111-117, issn 0300-8126Article

Bacteriophages induced from lysogenic root canal isolates of Enterococcus faecalisSTEVENS, R. H; PORRAS, O. D; DELISLE, A. L et al.Oral microbiology and immunology. 2009, Vol 24, Num 4, pp 278-284, issn 0902-0055, 7 p.Article