Received: 2 September 2019
Accepted: 31 October 2019
First Online: 21 November 2019
Ethics approval and consent to participate
: Not applicable.
: Consent for publication was obtained from the patient.
: NG reports fees from Bristol-Myers Squibb, Merck Sharp & Dohme, Roche/Genentech, and AstraZeneca for consultancy, travel, research outside the submitted work. The remaining authors declare that they have no competing interests.