Response to correspondence concerning: “Early hydroxychloroquine but not chloroquine use reduces ICU admission in COVID-19 patients” by A.J.J. Lammers, R.M. Brohet, R.E.P. Theunissen, C. Koster, R. Rood, D.W.M. Verhagen, K. Brinkman, R.J. Hassing, A. Dofferhoff, R. el Moussaoui, G. Hermanides, J. Ellerbroek, N. Bokhizzou, H. Visser, M. van den Berge, H. Bax, D.F. Postma, P.H.P. Groeneveld

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