[1] CMP, Buenos Aires, DF, Argentina
[2] Univ Antiquia, Medellin, Colombia
[3] Univ Fed Sao Paulo, Sao Paulo, Brazil
[4] Univ Autonoma Nuevo Leon, Hosp Dr Jose Eleuterio Gonzalez, Monterrey, Mexico
[5] Hosp San Bernardo, Salta, Argentina
[6] Fdn Valle Lili, Cali, Colombia
[7] Nuevo Hosp San Roque, Cordoba, Argentina
[8] Hosp Kennedy, Guayaquil, Ecuador
[9] Consultorios San Juan, San Juan, Argentina
[10] Univ Nacl La Plata, La Plata, Buenos Aires, Argentina
[11] Hosp Municipal Prof Dr Bernardo A Houssay, Vicente Lopez, Argentina
[12] Fundair, San Luis, Argentina
[13] Hosp Britan, Montevideo, Uruguay
[14] Clin Las Condes, Santiago, Chile
[15] Univ Nacl Rosario, RA-2000 Rosario, Argentina
[16] Ctr Med Docente La Trinidad, Caracas, Venezuela