Please choose the correct ending to complete the given sentence: Health: [header] How to undergo a lung biopsy [title] Record your symptoms. [step] If you think you may have a problem with your lungs, you should write down what symptoms you are experiencing. Keep a journal over a period of several days or weeks so that you can show your doctor a detailed account of what you've been feeling lately.

Ending1: [substeps] You may not feel pain in your chest and abdomen. You may also feel tenderness in your arms and legs. Ending2: [substeps] For example, you might record when you first started to notice gas in your airways, or a number of general symptoms that come with gas. [title] Ask your doctor about a lung biopsy. Ending3: Use the diary as a tool to determine what exactly your symptoms are. [substeps] Since lung biopsies are invasive, you may not be able to see or access any clear aspects of your lungs while you are undergoing the biopsy. Ending4: [substeps] This will help your doctor make an informed decision about whether or not you need a lung biopsy. Keep track of things like difficulty breathing, localized pain, shortness of breath, fever/chills, and coughing up blood.

Answer format: ending1/ending2/ending3/ending4