Acknowledgements
The authors would like to thank Mr. Yoshiki Segawa at the Institute for Clinical Research, Mie National Hospital, for his excellent technical assistance. The authors would also like to thank the IRAM study investigators who actively participated in the study: Dr. Ogura Kanae (Department of Pediatrics, Kyoto Yawata Hospital); Drs. Yutaka Suehiro, Yukiko Hiraguchi, Yuko Ebishima and Saeko Shimodera (Department of Pediatrics, Osaka Prefectural Medical Center for Respiratory and Allergic Diseases); Drs. Makoto Kameda, Yuri Takaoka, Tomoki Nishikido, Hiroko Yajima and Mineko Ikeoka (Department of Pediatrics, Osaka Prefectural Medical Center for Respiratory and Allergic Diseases); Drs. Hideo Ogura and Yukiko Ogura (Department of Pediatrics, Kochi National Hospital); Dr. Gyokei Murakami (Murakami Pediatric & Allergy Clinic); Drs. Toshimi Nakamura and Yoko Yamashita (Department of Pediatrics, Kanazawa Medical University Hospital); Dr. Yoko Kawasaki (Hotarugawa Clinic), Drs. Taku Oishi, Hiroaki Hisakawa, Akihiko Hisakawa and Hiroshi Wakiguchi (Department of Pediatrics, Kochi University); Dr. Hiroyasu Okahata (Department of Pediatrics, Kure Kyousai Hospital); Drs. Ikuo Okafuji and Shigeta Shimizu (Kobe City Medical Center General Hospital); Drs. Naomi Kondo, Eiko Matsui and Kazuo Kubota (Department of Pediatrics, Gifu University Hospital); Dr. Yutaka Morisawa (Kera Child & Allergy Clinic); Dr. Mitsuhiko Nambu (Department of Pediatrics, Tenri Hospital); Dr. Miki Takao (Department of Pediatrics, Takashige Memorial Hospital); Dr. Yoshinori Matsuwaki (Department of Otorhinolaryngology, Ota General Hospital); Drs. Yuichi Adachi and Toshiko Itazawa (Department of Pediatrics, Toyama University); Dr. Youichi Onoue (Onoue Pediatric Clinic); Dr. Osamu Higuchi (Department of Pediatrics, Kurobe City Hospital); Dr. Yoko Adachi (Department of Pediatrics, Takaoka Minami Hospital); Dr. Akihiko Terada (Terada Kid’s Allergy & Asthma Clinic); Dr. Yoko Osawa (Department of Otorhinolaryngology, Tannan Regional Medical Center); Dr. Rentaro Abumi (Abumi Clinic); Drs. Tatsuya Fuchizawa and Junko Yamamoto (Saiseikai Takaoka Hospital), Drs. Motokazu Nakabayashi and Masaharu Kasei (Department of Pediatrics, Kouseiren Takaoka Hospital); Drs. Takanori Abe and Mayumi Sugimoto (Department of Pediatrics, Japanese Red Cross Kochi Hospital); Dr. Hisashi Kondo (Kondo Pediatrics Clinic); and Drs. Akiko Toga and Nobuyuki Doichi (Department of Pediatrics, Fukui-ken Saiseikai Hospital).