Nakahigashi, Kyoko, Atsushi Otsuka, Hiromi Doi, Satsuki Tanaka, Yoshiaki Okajima, Hironori Niizeki, Asami Hirakiyama, Yoshiki Miyachi, and Kenji Kabashima. 2012. “Prostaglandin E2 Increase in Pachydermoperiostosis Without 15-Hydroprostaglandin Dehydrogenase Mutations”. Acta Dermato-Venereologica 93 (1):118-20. https://doi.org/10.2340/00015555-1398.