Reducing broad-spectrum antibiotic use in intensive care unit between first and second waves of COVID-19 did not adversely affect mortality by Chan, XHS, O'Connor, CJ, Martyn, E, Clegg, AJ, Choy, BJK, Soares, AL, Shulman, R, Stone, NRH, De, S, Bitmead, J, Hail, L, Brealey, D, Arulkumaran, N, Singer, M, Wilson, APR