sentences:  Although this new system has widened population coverage by the social and health security system from 21% (pre-1993) to 56% in 2004 and 66% in 2005, health disparities persist, with the poor continuing to suffer relatively high mortality rates.The refractive surgery keratomileusis was developed by Ignacio Barraquer in 1964 in Bogotá.On January 10, 1985, Dr. Elkin Lucena performed the first successful In vitro fertilization, that allowed the birth of the first Latin American test tube baby Carolina Mendez.