http://faculty.kfupm.edu.sa/coe/gutu...sc/retire1.htm
In summary...
"On the other hand, if you are not able to get out of the pressure-cooker or the high-speed battleground at the age of 55 and “have” to keep on working very hard until the age of 65 or older before your retirement, then you probably will die within 18 months of retirement. By working very hard in the pressure cooker for 10 more years beyond the age of 55, you give up at least 20 years of your life span on average"