But the official, who insisted on anonymity, said that he and his colleagues had not studied the revenue effects of today's revision.
Moreland and colleagues studied 755 patients, mostly white women.
Becker and his colleagues studied 74 people with high cholesterol.
My colleagues studied every basket made by the Philadelphia 76ers for more than a season.
She and her colleagues studied the records to find out which health care workers had been taking care of the patients.
Roediger and his colleagues have also studied the form of test which is most effective.
He and his colleagues studied 200 artists, first in art school, and then 18 years later.
Moore and colleagues studied the medical records of nearly 1,700 people with a confirmed shingles attack from 1996 to 2001.
Koch and colleagues studied about 300 heterosexual women for a decade.
Dr. Frank and her colleagues studied 138 depressed patients over a three-year period.