Aromatherapies using Osmanthus fragrans oil and grapefruit oil are effective complementary treatments for anxious patients undergoing colonoscopy: A randomized controlled study von Hozumi, Hideaki, Hasegawa, Sho, Tsunenari, Takazumi, Sanpei, Noriko, Arashina, Yuko, Takahashi, Kieko, Konnno, Ayako, Chida, Emi, Tomimatsu, Souichi

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