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• Use “ “ for phrases o [ “pediatric abdominal pain” ] • Use – to remove results with certain terms o [ “abdominal pain” –pediatric ] • Use OR to account for alternate terms o [teenager OR adolescent ]
단독에서 피부가 붉고 융기되며 가장자리에 뚜렷한 경계가 있습니다.
이미지 제공: 의학박사 토마스 하비프(Thomas Habif).