5-7.Use this case to answer the following questions.A 55-year-old male consulted his physician because of weakness,lightheadedness,vertigo,and angina.The patient also complained of sores on his tongue.The physical examination revealed jaundice.The pulse rate was increased,and the spleen and liver were slightly enlarged.The tongue appeared smooth and bright red in color.Family history revealed no clues.Neurological exam revealed quickening of reflex responses.Patient history indicated a total gastrectomy five years earlier for stomach cancer and intermittent heart problems that had not required surgery.The physician ordered the following tests: 
-What would be the results of vitamin B₁₂ and/or folate levels in a diagnosis of pernicious anemia?
Definitions:
Stage 2 Sleep
A period of light sleep before entering deeper sleep stages, characterized by specific brain wave patterns.
Rotating Shift Schedule
A work scheduling system where employees alternate their work hours across various shifts, to cover different parts of the day and night.
Accidents
Unforeseen and unplanned events that result in damage or injury, occurring without the intent of the involved parties.
Productive
Having the capability or efficiency to produce a significant quantity of output, results, or progress.
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