AP Top Health News At 6:35 a.m. EST

Experts raise concerns over superhuman workplace

LA County voters mandate condom use on porn sets

Study: Stem cells from strangers can repair hearts

Study: Looking old may be a sign of heart risks

Pfizer says FDA approves arthritis drug Xeljanz

Study: Vitamins don't lower heart risks in men

UK police open inquiry into breast cancer surgeon

Even fit baby boomers won't escape heart problems

Meningitis outbreak toll: 424 cases, 31 deaths

Doctors debate value of 'fringe' heart treatment