Clinical recommendations	Evidence rating	References
A normal white blood cell count does not rule out appendicitis.	C	12
Simultaneous amylase and lipase measurements are recommended in patients with epigastric pain.	C	13
Ultrasonography is the imaging study of choice for evaluating patients with acute right upper quadrant abdominal pain.	C	14
Computed tomography is the imaging study of choice for evaluating patients with acute right lower quadrant or left lower quadrant abdominal pain.	C	15, 16