Question: 65-year-old man comes to the clinic with complaints of loss of energy, weight gain despite healthy eating and activity when he can stand it, feeling cold all the time and seems to have a hard time expressing himself. He tells the nurse, "I just thought this is because I am old and my body and mind are tired, but I cannot stand to be like this. I used to be able to remember every single detail from past years' events, but I can hardly remember my own name these days. This is not who I am! Help me, please!".