Meditation training increases brain efficiency in an attention task - Kozasa, Elisa H.; Sato, João R.; Lacerda, Shirley S.; Barreiros, Maria A. M.; Radvany, João; Russell, Tamara A.; Sanches, Liana G.; Mello, Luiz Eugênio; Amaro Junior, Edson (NeuroImage, 2012)