[1] Zucker Sch Med Hofstra Northwell, Great Neck, NY USA
[2] Simon Bolivar Univ, Barranquilla, Colombia
[3] Clin Costa, Barranquilla, Colombia
[4] CEMIC, Buenos Aires, DF, Argentina
[5] Inst Nacl Ciencias Med & Nutr Salvador Zubiran, Mexico City, DF, Mexico
[6] Inst Ginecol & Reprod, Lima, Peru
[7] Ohio State Univ, Columbus, OH 43210 USA
[8] Genentech Inc, San Francisco, CA 94080 USA
[9] F Hoffmann La Roche Ltd, Basel, Switzerland
[10] Hoffmann La Roche Ltd, Mississauga, ON, Canada
[11] Org Med Invest, Buenos Aires, DF, Argentina