Diagnosis of pseudoxanthoma elasticum in a 4‐year‐old boy. Issue 2 (22nd March 2017) - Maki, Nobuki; Komine, Mayumi; Tsuda, Hidetoshi; Fujita, Yurika; Fujita, Etsuko; Murata, Satoru; Demitsu, Toshio; Utani, Atsushi; Ohtsuki, Mamitaro