1. Division of Gastroenterology and HepatologyBeth Israel Deaconess Medical Center, Harvard Medical SchoolBostonMassachusettsUSA
2. Department of OncologyThe First Affiliated Hospital of Sun Yat‐sen UniversityGuangzhouChina
3. Gilead Sciences, Inc.Foster CityCaliforniaUSA
4. Institute of Translational ImmunologyUniversity Medical CenterMainzGermany