Security Institute. (IMSS) Period: January 1 to December 31, 1986 Tijuana, B.C. Social service Health center “B” with hospital “C” Health Jurisdiction III (SSA) Period: February 1, 1987 to January 31, 1988 Ensenada, B.C. Professional Exam Date: August 14, 1987 POSTGRADUATE STUDIES Specialty: General Surgery General Hospital of the Secretary of health. Period: March 1, 1988 to February 28, 1991 Durango, Dgo. Specialty: Gastrointestinal endoscopy Hospital Center “November 20” ISSSTE Period: March 1, 1992 to February 28, 1993 Mexico, D.F.