RT Journal Article SR Electronic T1 STUDY REVEALS LOW RISK OF COVID-19 INFECTION AMONG PATIENTS UNDERGOING HEAD AND NECK CANCER SURGERY JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 118 OP 118 VO 42 IS 1 YR 2021 UL http://smj.org.sa/content/42/1/118.abstract AB