Venezuela's opposition demands "whole truth" about Chavez health

CARACAS (Reuters) - Venezuela's opposition on Wednesday demanded the government tell "the whole truth" about the health of cancer-stricken President Hugo Chavez, who has not been heard from in three weeks after undergoing a gruelling operation in Cuba.

Officials have acknowledged the usually garrulous former soldier's health is delicate after his fourth cancer surgery in 18 months, but have offered scant details on his condition.