Disclosure statement
Susan P. Mollan has received payment for consultancy work from Invex Therapeutics. She has received payment for advisory boards from Gentech and Ocular Therapeutix. Grant funding has been paid to her institution from the National Institute of Health Research (NIHR131211), UK Space Agency and IIHUK.
No other authors have conflicts of interests to declare.
Author contribution
VM and MSH jointly wrote the letter together. SPM revised the letter.