Mariah Carey, Dave Chapelle???the list goes on and on.It would all make a lot of sense, except, medically, it doesn't.Exhaustion is a symptom, confirms Andrew Spanswick, founder of the KLEAN Treatment Center in West Hollywood.In saying this, Spanswick echoes the conclusions of many kinds of health experts I have spoken with, including Steven Krems, a doctor at the Centinela Freeman Regional Medi