FILE - In this Oct. 11, 2011, file photo, Venezuela's President Hugo Chavez points at his head to show that his hair has started to grow back after his last round of chemotherapy at Miraflores presidential palace in Caracas, Venezuela. Venezuela's Communication and Information Minister Ernesto Villegas on Monday, March 4, 2013, reported that President Hugo Chavez's health has deteriorated and remains delicate. Villegas also announced in the national TV broadcaster VTV that the president is undergoing chemotherapy with high impact. (AP Photo/Ariana Cubillos, file)CARACAS, Venezuela (AP) — Venezuelan President Hugo Chavez has undergone surgeries, chemotherapy and radiation treatment since June 2011 for an undisclosed type of pelvic cancer. Key moments in his medical treatment have included:

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