>>59
https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.jstage.jst.go.jp/article/jpnjschhealth/60/1/60_41/_pdf&ved=2ahUKEwipo9qNg7f5AhUbyosBHWO_DykQFnoECCIQAQ&usg=AOvVaw1UBGcKjdTgZ2hXptA9pxya