We are grateful to the following dermatologists for their cooperation in providing information on CPN patients and providing answer to our questionnaires; Hiroyuki Okamoto, MD (Kansai Medical University), Atsushi Utani, MD (Kyoto University), Yayoi Nagai, MD (Gunma University), Osamu Yamasaki, MD (Okayama University), Taisuke Itoh, MD (Hamamatsu University School of Medicine), Takatoshi Shimauchi, MD (University of Occupational and Environmental Health), Toshiyuki Yamamoto, MD*, Yumiko Furuhata, MD (Tokyo Medical University), Ko-Ron Chen, MD (Saiseikai Central Hospital), Tamihiro Kawakami, MD (St. Marianna University School of Medicine), Naoko Ishiguro, MD (Tokyo Women’s Medical University), Setsuya Aiba, MD (Tohoku University), Kensei Katsuoka, MD (Kitasato University), Mikio Masuzawa, MD (Kitasato University), Seiji Kawana, MD (Nippon Medical School), Shinichi Sato, MD (Nagasaki University), Eishin Morita, MD (Shimane University), Seiichi Izaki, MD (Saitama Medical University). * Currently at the Department of Fukushima Medical University.
Conflict of interest statement
The authors have no potential conflict of interest.