Into late 1961, disagreements existed among Kennedy's doctors concerning his proper balance of medication and exercise. The president preferred the former, because he was short on time and desired immediate relief. During that time, the president's physician, George Burkley, did set up some gym equipment in the White House basement, where Kennedy did stretching exercises for his back three times a week. Details of these and other medical problems were not publicly disclosed during Kennedy's lifetime. The President's primary White House physician, George Burkley, realized that treatments by Jacobson and Travell, including the excessive use of steroids and amphetamines, were medically inappropriate, and took effective action to remove the president from their care. Dr. Nassir Ghaemi, a physician who reviewed Kennedy's medical records in his presidential archives, has opined that Kennedy's leadership (e.g. the 1962 Cuban Missile crisis and other events during 1963) improved greatly once the treatments of Jacobson had been discontinued and been replaced by a medically appropriate regimen under Burkley. Ghaemi concluded there was a "correlation; it is not causation; but it may not be coincidence either".