Affiliation: | (1) Department of Paediatrics, Institute of Clinical Medicine, University of Tsukuba, 1-1-1, Tennodai, 305 Tsukuba-shi, Ibaraki-ken, Japan;(2) Department of Paediatrics, Kensei Hospital, 309-12 Iwase-machi, Ibaraki-ken, Japan;(3) Department of Dermatology, Kensei Hospital, 309-12 Iwase-machi, Ibaraki-ken, Japan |