For the last 13 years Maybell Izzard has been caring for her chronically ill and disabled husband, who has back pain, depression, diabetes, emphysema, and heart disease. The septuagenarian also suffered a stroke that left him numb from the waist down and barely able to walk from the living room to the bathroom.“It’s been rough,” says Izzard, 66, who also deals with her own chronic health problems. “You get so tired, and you get so...