COVID-19(7) Urology(5) outcome(4) USA(4) Elective surgery(4) rectal cancer(4) reduced(4) coronavirus(4) Transmission(4) Colorectal surgery(4) experience(4) National(4) benefit(4) renal surgery(4) hospital(4) COVID(4) United Kingdom(4) Safe(4) Cambridge(4) less(4) pandemic(4) surgical(4) recommendations(4) renal(4) initial(4) Cancer(4) Patient(4) histology(4) increased risk(4) mitigate(4)