Toronto doctor Dr. Anthony Galea has been formally indicted on five counts by a federal grand jury in Buffalo, New York after being charged earlier this year. The charges allege that Dr. Galea, a sports medicine specialist, smuggled human growth hormone and other unapproved substances into the U.S., and that he lied to border agents to avoid getting caught, the Toronto Star reports. He is also accused of of illegally treating 20 professional athletes—he is not authorized to work in the United States—between October 2007 to September 2009, and supplying them with free Viagra. While the athletes were not identified by name, Tiger Woods has previously admitted to be being treated by Dr. Galea, while he denies having received performance-enhancing drugs. Dr. Galea, 51, first came under suspicion after a criminal complaint in May, which included similar charges. Dr. Galea also faces several charges in Canada for selling an unapproved drug, conspiring to import and export an unapproved drug, and smuggling goods into the country.