Pharmaceutical payments to Japanese certified hematologists: a retrospective analysis of personal payments from pharmaceutical companies between 2016 and 2019 - Eiji Kusumi; Anju Murayama; Sae Kamamoto; Moe Kawashima; Makoto Yoshida; Hiroaki Saito; Toyoaki Sawano; Erika Yamashita; Tetsuya Tanimoto; Akihiko Ozaki (Blood Cancer Journal, 2022)