%0 Journal Article %T James Jurin and the avoidance of bias in collecting and assessing evidence on the effects of variolation %A Alexander Bird %J Journal of the Royal Society of Medicine %@ 1758-1095 %D 2019 %R 10.1177/0141076819833289 %U https://journals.sagepub.com/doi/full/10.1177/0141076819833289