Rationale and Design of ORCHID: A Randomized Placebo-controlled Clinical Trial of Hydroxychloroquine for Adults Hospitalized with COVID-19. - Casey JD; Johnson NJ; Semler MW; Collins SP; Aggarwal NR; Brower RG; Chang SY; Eppensteiner J; Filbin M; Gibbs KW; Ginde AA; Gong MN; et al. (Annals of the American Thoracic Society, 2020)