It's claimed that around 90% of Americans are choline deficient. Eggs are one the best nutritional sources for choline. There are several papers linking low choline levels with Altzheimer disease so it would not be surprising to find a link between egg consumption and Altzheimer incidence. Sponsored studies should indeed be treated with much caution but is anyone suggesting such authors invent positive results or ignore highly inconvenient results? Such behavior would be reprehensible and not something with which a researcher would wish to be associated.