Tip: Spend less than a third of your income on all housing-related expenses. May 31, 2011 -- Stan Humphries, chief economist at Zillow, and Celia Chen, senior director at Moody's Analytics, spoke ...

By Alisha Haridasani Gupta In her late 40s, Celia Chen began experiencing unexplained symptoms like anxiety, a spike in blood sugar, acne and chronic pain in her shoulder — all of which she ...