... ,pancreas,gstric and uterineSPECIMEN COLLECTIONFor serum, collect blood into a container without anticoagulant. Allow the blood to clot and separate the ... on the day of collection, store the serum specimen in a refrigerator or freezer. Bring the specimens to room temperature ... region. Please consult your physician to perform a much more detailed exam.Invalid: A total absence of color in both regions is ...