How to Avoid Collider Bias in Genetic Studies

I thought you had a super interesting kind of way of building these different cohorts and drawing all those different components in your manuscript. I wonder could you tell us what collider bias is and do you have any tips for other people designing studies particularly genetic studies such as this one on addressing or avoiding it? Yes that is the toughest question you could possibly ask because it's possible to explain what it is but to give you the wise and weird force I think requires a hard-called degree in epidemiology so let me explain what it was and the tips for how you can address it.