This study has a number of strengths
Tobacco industry involvement in smuggling then In the late 1990s, overwhelming evidence from companies own documents showed that facilitating the smuggling of their own products had been a core part of their business strategy for decades, and a third of global cigarette exports were ending up on the illicit market
We are not the only scholars to identify cigarette smuggling as a large problem, especially in high-taxed areas
Applying these models in parallel can help triangulate MR inferences through parametric and non-parametric approaches, making results more robust and less likely to be affected by weak violations of MR assumptions
They also contain over 4000 other chemicals, more than 60 of which have been identified as carcinogens
For the same reasons as I describe later on that different attributable fractions cant simply be added up and dont sum up to 100% this doesnt mean that other factors have no impact on cervical cancer cases