If there is more relation, we dont know yet, scientists still working on it, so we will see in the future. The problem here is tho, we, people who stutter, dont make enough sounds to show the world we exists too, if we do make enough sound and draw enough attention, more scientists will focus on us and find the answers or maybe a solution faster. See how they invented vaccines to a virus that its structure was very ambiguous ? (Talking about Covid-19) because all the focus and budgets were on this vaccine, so they figured it out in less than a year and a half, which is amazing !