Drs. Dan Negoianu and Stanley Goldfarb at the University of Pennsylvania reviewed published clinical studies on the topic and found no data to suggest people need to stick to the “8 x 8″ rule.
“Indeed, it is unclear where this recommendation came from,” they write in an editorial in the June 2008 issue of the Journal of the American Society of Nephrology.
Then I had to look up Nephrology.
Kerry Cue is a humorist, journalist, mathematician, and author. Her latest book is a crime novel, Target 91, Penmore Press, Tucson, AZ (2019)