Larsen SA, Oberle MW, Sanchez-Braverman JM, Rosero-Bixby L, Vetter KM. A population-based serosurveillance of syphilis in Costa Rica. Sex Transm Dis. 1991 Apr-Jun;18(2):124-8.
Larsen SA, Oberle MW, Sanchez-Braverman JM, Rosero-Bixby L, Vetter KM. A population-based serosurveillance of syphilis in Costa Rica. Sex Transm Dis. 1991 Apr-Jun;18(2):124-8.