Etoposide in recurrent childhood Langerhans' cell histiocytosis: an Italian cooperative study. - Ceci,A.; de Terlizzi,M.; Colella,R.; Balducci,D.; Toma,M.G.; Zurlo,M.G.; Macchia,P.; Mancini,A.; Indolfi,P.; Locurto,M. (Cancer, 1988)