A group of doctors have signed this petition urging John McCain to release his medical records:

John McCain has not yet released his medical records to the public. McCain is 72 years old, and has been diagnosed with invasive melanoma. In May of this year, a small group of selected reporters were allowed to review 1,173 pages of McCain’s medical records that covered only the last eight years, and were allowed only three hours to do so. John McCain’s health is an issue of profound importance. We call on John McCain to issue a full, public disclosure of all of his medical records, available for the media and members of the general public to review.

Watch a video of doctors explaining why McCain should listen: