I've had clothes custom-tailored by a seamstress. I've had vacations custom-planned by travel agents. And now, I've received a custom-designed personal health plan from medical experts.

Recently, I joined a group of volunteers at Emory University submitting to an exhaustive -- and exhausting -- "predictive health assessment" that researchers used to determine the specific health risks I face and to prescribe changes to my behavior and lifestyle with the aim of reducing those risks.