We examined the association between hydroxychloroquine use and intubation or death at a large medical center in New York City. Data were obtained regarding consecutive patients hospitalized with Covid ...

Where can observational studies be registered? An increasing number of clinical trial registries exist and, despite their names, some include observational studies ...

Kathryn Snow does not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and has disclosed no relevant affiliations beyond their ...