Home visiting by paraprofessionals and by nurses: A randomized, controlled trial - Olds, David L.; Talmi, Ayelet; Hiatt, Susan; Korfmacher, Jon; Sheff, Karen L.; Ng, Rosanna K.; Henderson, Charles R.; Pettitt, Lisa M.; Luckey, Dennis W.; O'Brien, Ruth; Robinson, JoAnn (Pediatrics, 2002)