TY - JOUR T1 - Effect of COVID-19 pandemic lockdowns on planned cancer surgery for 15 tumour types in 61 countries: an international, prospective, cohort study. JO - Lancet Oncol PY - 2021/10/05 AU - COVIDSurg Collaborative ED - DO - DOI: 10.1016/S1470-2045(21)00493-9 Y2 - 2024/12/22 ER -