by SIFONTES, J E
Published in Pediatrics (Evanston) (01.10.1957)

by SIFONTES, J E
Published in American review of tuberculosis (01.08.1956)

by SIFONTES, J E, ANASTASIADES, A A
Published in American review of tuberculosis (01.09.1957)

by Pedraza Peña, L R, Rodríguez Santana, J R, Sifontes, J E
Published in Puerto Rico health sciences journal (01.03.1994)

by LINCOLN, E M, SIFONTES, J E
Published in The Medical clinics of North America (01.03.1953)

by Sifontes, J E
Published in Boletin de la Asociación Médica de Puerto Rico (01.03.1980)

by Sifontes, J E
Published in Boletin de la Asociación Médica de Puerto Rico (01.12.1976)

by Sifontes, J E, Valcárcel, M
Published in Boletin de la Asociación Médica de Puerto Rico (01.10.1983)

by SIFONTES, J E, WILLIAMS, R D B, LINCOLN, E M, CLEMONS, H
Published in American review of tuberculosis (01.06.1953)

by Vázquez Agosto, S, Rico, I, Sifontes, J E, Mayol, P M
Published in Boletin de la Asociación Médica de Puerto Rico (01.11.1990)

by Rivera, R, Mayol, P M, Sifontes, J E
Published in Boletin de la Asociación Médica de Puerto Rico (01.02.1986)

by Sifontes, J E
Published in Boletin de la Asociación Médica de Puerto Rico (01.10.1968)

by Mayol, P M, Olmedo, L F, Sifontes, J E
Published in Boletin de la Asociación Médica de Puerto Rico (01.10.1987)

by SIFONTES, J E
Published in Boletin de la Asociación Médica de Puerto Rico (01.03.1965)

by Rivera, R, Sifontes, J E, Mayol, P M, Vázquez, S
Published in Boletin de la Asociación Médica de Puerto Rico (01.07.1986)

by Valentín, L I, Márquez, E, Rivera, R, Sifontes, J E
Published in Boletin de la Asociación Médica de Puerto Rico (01.08.1986)

by Mayol, P M, Rodríguez Santana, J R, Frontera, W, Sifontes, J E
Published in Boletin de la Asociación Médica de Puerto Rico (01.10.1988)

by Mayol, P M, Sifontes, J E, Mercado, A, Rivera, R
Published in Boletin de la Asociación Médica de Puerto Rico (01.05.1986)

by SIFONTES, J E
Published in Boletin de la Asociación Médica de Puerto Rico (01.03.1956)

by Rivera, J F, Rodríguez-Santana, J R, Vázquez-Agosto, S, Vélez-Vega, W, Sifontes, J E, Mayol, P M
Published in Boletin de la Asociación Médica de Puerto Rico (01.05.1990)