Bolivian president says Chavez undergoing physiotherapy to return to Venezuela

Is Chavez really dead or what happened that he cannot take office.http://www.washingtonpost.com/world/the_americas/bolivian-president-says-venezuelas-chavez-in-therapy-for-return-home/2013/01/22/23dfbbca-64ab-11e2-889b-f23c246aa446_story.html