Bret Petersen, MD Disclosures: Advisor-Olympus America|Grant or research support-Boston Scientific Corp|Grant or research support-AMBU|Paid consultant-Pentax|Consulting Fee-Pfizer (Relationship has ended)|Stocks or stock options, excluding diversified mutual funds-Pfizer, Inc.|Stocks or stock options, excluding diversified mutual funds-Abbott Laboratories|Stocks or stock options, excluding diversified mutual funds-Pfizer, Inc.|Stocks or stock options, excluding diversified mutual funds-moderna|Stocks or stock options, excluding diversified mutual funds-Guardant Health - 08/10/2022 No Bio Available.