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[Correspondence] Accelerating the evidence for new classes of long-lasting insecticide-treated nets

The comment by Gerry F Killeen and Hilary Ranson (April 21, p 1551),1 on our trial of long-lasting synergist piperonyl butoxide and pyrethroid-treated nets and indoor residual spraying for control of insecticide-resistant malaria mosquitoes (April 21, p 1577),2 although summarising accurately the trial’s findings, was less a commentary on its implications for future malaria control than a critique on the slow rate of progress in getting piperonyl butoxide synergist and other new long-lasting insecticidal nets implemented to scale.