title: Reply to A. Wong et al.
authors.affiliation: Center for Cancer Research, National Cancer Institute, Bethesda, MD.
authors.forename: Victoria L
authors.initials: VL
authors.lastname: Chiou
authors.affiliation: Clinica Alemana de Santiago, Universidad del Desarrollo, Santiago, Chile mburotto@alemana.cl.
authors.forename: Mauricio
authors.initials: M
authors.lastname: Burotto