Safety of hydroxychloroquine, alone and in combination with azithromycin, in light of rapid wide-spread use for COVID-19: a multinational, network cohort and self-controlled case s... by Lane, JCE, Weaves, J, Kostka, K, Alser, O, Alser, O, Prats-Uribe, A, Prats-Uribe, A, Newby, D, Prieto-Alhambra, D