"Ibought it forhimfor Christmasthree or fouryears ago," Timrecalled, adding that Marshall'swife, Sara, said she wouldbuyMarshalla shed for hisbirthdaysohecouldput thesnow blower in it.
TimMarshall, a senior lecturer in epidemiology at Birmingham University, with much experience of setting up scientific studies, said that the research was likely to be "worthless".