As an elder of many years, I was continually struck with the abundance of chronically ill Witnesses whose disease appeared to be related to their own stress at trying to meet the endless demands of the "truth". I am not a medical professional but I don't need to be a doctor to know that the depression and virtual self loathing ('I'm not good enough, I must do more, I'm a bad parent....") sets a stage for ill health.
And now science backs up that conclusion:
http://www.amazon.com/When-Body-Says-Understanding-Stress-Disease/dp/0471219827
If you are a chronically ill Witness - or know someone who is, I strongly urge you to read this book and take stock of your life _ "When The Body Says No". I can see the harsh demanding mindset of typical Witnesses in nearly every page describing the suffering of emotionally damaged people with arthritis, MS, scleroderma and countless other sicknesses.
Is "The Truth" killing you - it's a fair question.
metatron