title: Response to van Assen et al.
authors.affiliation: Department of Hematology/Oncology, The Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 109-8639, Japan.
authors.initials: U
authors.lastname: Machida
authors.initials: M
authors.lastname: Kami
authors.initials: Y
authors.lastname: Tanaka
authors.initials: Y
authors.lastname: Kanda
authors.initials: H
authors.lastname: Hirai