Please choose the correct ending to complete the given sentence: Health: [header] How to fight depression linked to psoriatic arthritis [title] Pay attention to your energy levels. [step] Fatigue is a common symptom of psoriatic arthritis, but it can also be a sign of depression. If you've been feeling more tired than usual lately, it doesn't necessarily mean you're depressed.

Ending1: You may notice that you haven't had enough sleep recently, despite staying up all night. If you're suffering from psoriatic arthritis, try to find a way to improve your energy levels by keeping a consistent sleep schedule. Ending2: If your energy levels are high, you probably just want to work up a great workout. The sooner you can think of a cause of that tiredness, the easier it will be to reduce your fatigue. Ending3: You should treat your depression like an illness, and avoid using it as a weapon. [substeps] If you feel you're not doing well, take measures to increase your energy levels. Ending4: However, it's a good idea to be alert for any other warning signs. [title] Notice whether your mood is lower than usual.

Answer format: ending1/ending2/ending3/ending4