Univision Radio and its radio stations around the country will join the fight against childhood cancer during the Promesa y Esperanza (Promise and Hope) radiothon, to be held on March 4-5, 2010, benefiting St. Jude Children's Research Hospital, one of the world's premier pediatric cancer research centers. Radio listeners interested in joining the fight against childhood cancer by making a pledge to become an Angel de Esperanza (Partner in Hope) by donating $20 per month by calling 1-800-998-VIDA (8432) or visiting www.promesayesperanza.org during the days of the event.