Diabetes and overweight/obesity are independent, non-additive, risk factors for the in-hospital severity of COVID-19: An international, multi-center retrospective analysis. (August 2021) - Longmore, D.K.; Miller, J.E.; Bekkering, S.; Saner, C.; Mifsud, E.; Zhu, Y.; Saffery, R.; Nichol, A.; Colditz, G.; Short, K.; Burgner, D.P.