Maggie is a 15 year old female, 5 ft 7 inches tall and weighs 90 pounds. Even though it is August, Maggie is wearing sweatpants and three layers of shirts. Her hair is dry, brittle, and uncombed, and she is wearing no makeup. Her family physician is referring her to your clinic for evaluation of 20 pounds weight loss in 4 months and her menstrual periods have ceased. She appears to the clinic weak and lethargic but reports having difficulty sleeping. Her parents report she is an avid ballet dancer, her grades have dropped from A/B to barely passing classes. She prefers to stay in her room, no longer hanging out with her friends and is noted to be exercising for long hours. What assessment data should the nurse collect? What interventions should be implemented?