Big drug companies reveal information on gifts to doctors.

Ten large drug companies are releasing information on their websites, listing the millions of dollars of payments made to health-care professionals and organizations, such as hospitals and doctor groups. They have also listed payments made to doctors to cover their travel expenses to international meetings.

The participating companies include:

GlaxoSmithKline, Amgen, Bristol-Myers Squibb, Gilead, Eli Lilly, Merck, Novartis, Purdue, Roche, AbbVie Corp.

In all, the 10 companies offered more than $48 million in payments in 2016, though not all companies included figures for the entire year.

-