Detection of allergic reactions during oral food challenge using noninvasive urinary prostaglandin D2 metabolites. Issue 1 (5th September 2021) - Inuzuka, Yusuke; Yamamoto‐Hanada, Kiwako; Nakamura, Tatsuro; Shimosawa, Tatsuo; Murata, Takahisa; Ohya, Yukihiro