ME was first known in the as Yuppie Fever, (A Yuppie was a young wiz kid in the late 80s early 90s) this was said to do with all the work related stress that they had from the stock/money market.
You can understand how JWs also get this aliment, what with all the stress of living up to all that is demanded from you as JWs. Im thinking of, do more, pioneer, meetings, guilt of not being worthy, gossip, pre-study, FS, the fear of losing Gods favour, and all the other pit falls of being a JW.
No wonder many Jws are depressed and ill, it makes you being a JW.
See:
http://news.bbc.co.uk/1/hi/health/medical_notes/97509.stm
frogit