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Thus saith this article. Make sense.
https://www.msn.com/en-us/health/other/scientists-warn-of-a-tsunami-of-osteoarthritis-cases-by-2050/ar-BB1kzyYW
I’ve given anesthesia for probably hundreds of total knee replacements. The number of skinny people who have had this operation I can count on the fingers of one hand.
However, it was not unusual to see normal sized people having hip replacements.