1) Titles of articles take initial capitals when they are in the title position but not in the reference position.

Example:

• Title: Autonomic Response in Depersonalization Disorder
• Reference: Sierra M, Senior C, Dalton J. Autonomic response in depersonalization disorder. Arch Gen Psychiatry. 2002:598):100-103.

2) In titles and headings, capitalize 2-letter verbs, such as go, do, am, is, be. Note: In infinitives, "to" is not capitalized. Do not capitalize a coordinating conjunction, article, or preposition of 3 or fewer letters, except when it is the first word in the title or subtitle.

Example:

• What Is Sarcoma?
• We Do Need to Treat Mild Hypertension
• Where the World Will Be in the Year 2020
• Defining the Role of Computed Tomography in Injuries Resulting From Blunt Abdominal Trauma

3) In compound terms from languages other than English, capitalize all parts of the expression.

Example:

• Fluorescence In Situ Hybridization in Surgical Specimens of Lung Cancer
• Nephrectomy With Concomitant En Bloc Adrenalectomy

4) With a phrasal verb, such as "follow up," capitalize both parts in a title.

Example:

• The Need to Follow Up the Patient With Esophageal Cancer

Source: AMA Manual of style