RT Journal Article SR Electronic T1 Is chloroquine or hydroxychloroquine useful in treating people with COVID-19, or in preventing infection in people who have been exposed to the virus? JF Neurosciences Journal JO Neurosciences (Riyadh) FD Prince Sultan Military Medical City SP 220 OP 220 VO 26 IS 2 YR 2021 UL http://nsj.org.sa/content/26/2/220.abstract AB