A 67-year-old man recently lost his wife after being married for 42 years. He met his wife shortly after he returned from Vietnam as a combat soldier. He visits his physician and reports decreased appetite, moodiness, and extreme fatigue, even though he sleeps 10 to 12 hours a night. When giving his medical history, he admits that he drinks 4 or 5 beers and smokes marijuana almost every day. What do you think caused this man's new symptoms and why? As this man's office nurse, what other assessment data do you need to collect? What screening tools might you use? For what safety issues is this older adult at risk and why? With whom might you collaborate to develop his plan of care?