Please choose the correct ending to complete the given sentence: Health: [header] How to cite uptodate [title] Start with the names of the authors. [step] Use the authors' last names and initials. For your citation entry, use the names of the authors of the article, not the names of anyone who may have updated the article.

Ending1: [substeps] For example, if you are writing an encyclopedia, you may write the author's first and last name and then use the first and last names of people whose last names you found during the article. [title] Format the text in a " bibliography " format. Ending2: Avoid using " they " in the capitalized form, like " him " or " her. " your citation should list the author's last name, followed by their name. Ending3: If you have difficulty incorporating information in your reference list, this is the best time to do so. Include at least some basic information-including the edition and copyright numbers, page numbers, year/month (if any), etc. Ending4: [substeps] If there are multiple authors, list them exactly as they appear under the title of the article. Separate the names with commas, and include an ampersand before the final author's name.

Answer format: ending1/ending2/ending3/ending4