Martino, Florentine and Brooks, Ruby and Browne, Jennifer and Carah, Nicholas and Zorbas, Christina and Corben, Kirstan and Saleeba, Emma and Martin, Jane and Peeters, Anna and Backholer, Kathryn (2021) The nature and extent of online marketing by big food and big alcohol during the COVID-19 pandemic in Australia: content analysis study. JMIR Public Health and Surveillance , 7 , (3) , e25202.