In the 80s my last airline did but then stopped the semi secret program although one captain bought a meter and had his own program. IIRC Lufthansa had one or their union did.
Like aerotoxic, malaria and other illnesses associated with flying especially to africa it wasn’t in the companies interest to disperse the knowledge amongst the ranks.
Although we had a limit for cabin crew with the number of North Atlantic flights - my daughter later worked for virgin and often flew double our limit.