It seemed to me that a lot of premies in the 70s were always fatigued. I put it down to low scale depression.
Don't forget Dr Sandy now calling herself Dr Sandra Cabot who may or may not have diagnosed trendy illnesses but she took it a step further. She created a trendy diagnosis, so trendy and so successful that I imagine she's richer than Rawat. Actually a trendy cure for a non-existent illness. She created it and as quick look on Amazon shows she rode the wave as long as she could. Even employed ghost writers.