Answer: except if the income is from the institution which currently employs the investigator.
Explanation:
According to the U.S. Public Health Service, it should be noted that the investigators are typically expected to disclose the travel that is either sponsored or reimbursed by public traded company.
According to the U.S. Public Health Service, a "significant financial interest" includes royalty income paid to an investigator and its disclosure is required except if the income is from the institution which currently employs the investigator.
