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References from Is fasting a necessary preparation for abdominal ultrasound?. Local targets link to admitted publications; unresolved targets remain external evidence.
10.1002/jcu.1990.18.8.627
10.1002/jcu.1990.18.8.627 · 1990 · External reference
10.1002/jcu.1870150705
10.1002/jcu.1870150705 · 1987 · External reference
10.2214/ajr.153.5.993
10.2214/ajr.153.5.993 · 1989 · External reference
10.1097/00004424-199308000-00011
10.1097/00004424-199308000-00011 · 1993 · External reference
10.2214/ajr.157.4.1892030
10.2214/ajr.157.4.1892030 · 1991 · External reference
