What are the long-term symptoms and complications of COVID-19: a protocol for a living systematic review [version 2; peer review: 2 approved] oleh Melina Michelen, Vincent Cheng, Lakshmi Manoharan, Natalie Elkheir, Drew Dagens, Claire Hastie, Margaret O'Hara, Jake C. Suett, Dania Dahmash, Paulina Bugaeva, Ishmaela Rigby, Daniel Munblit, Eli Harriss, Amanda Burls, Carol Foote, Janet Scott, Gail Carson, Piero Olliaro, Louise Sigfrid, Charitini Stavropoulou