Self-swabbing versus assisted swabbing for viral detection by qRT-PCR: the experience from SARS-CoV-2 based on a meta-analysis of six prospectively designed evaluations conducted i... by Fowler, T, Chapman, D, Futschik, ME, Tunkel, SA, Blandford, E, Turek, E, Kolade, O, da Cunha, SS, Dodgson, A, Klapper, P, Sudhanva, M, Davies, L, Hill, S, Hopkins, S, Peto, T