I think this article describes it well, including the absolute cultural prevalence, belief, and influence :). It is written in regard to a single country (Croatia) but applies to Balkans and few other parts of Europe as well:
My family members used to yell at me for sitting down on a stone fence or concrete bench, because something something cold stone ... lower back / kidney disease.
The same irrational belief is common in Germany as well. Cold air is thought to cause things like the common cold and bronchitis.
Some people would feel a slight draft indoors and immediately start yelling for the windows to be closed.
I knew a very wealthy guy in Germany who bought a Mercedes 560SEL - at the time, the top-of-the-line model. He ordered it without air conditioning because he didn't want to get bronchitis.
https://zablogreb.wordpress.com/2012/12/26/propuh-or-the-gre...