[Recent topics on development of nanomaterials and nano-safety science].

Yasuo Yoshioka,, and Yasuo Tsutsumia,c aLaboratory of Toxicology and Safety Science, Graduate School of Pharmaceutical Sciences, Osaka University; 16 Yamadaoka, Suita, Osaka 5650871, Japan: bLaboratory of Biopharmaceutical Research, National Institute of Biomedical Innovation; 768 Saito-Asagi, Ibaraki, Osaka 5670085, Japan: and cThe Center for Advanced Medical Engineering and Informatics, Osaka University; 16 Yamadaoka, Suita, Osaka 5650871, Japan.