Problem: A 20-year-old woman presents with low body weight. She rarely eats, exercises often, and is anxious, as she believes that she has an overweight BMI. Her body mass index is 17.5 kg/m2. She has been underweight for the past three years. On physical examination, she has enlarged salivary glands and scars on the dorsum of her hand. A complete blood count, urinalysis, basic metabolic panel, phosphorus, calcium, magnesium, and thyroid-stimulating hormone are ordered. Of the following, which additional test should be ordered to evaluate this patient? Need Assignment Help? Chest X-ray Cortisol level Dual-energy X-ray absorptiometry test Follicle-stimulating hormone and luteinizing hormone