The data show that, after failure of second-line chemotherapy, lung-cancer patients rarely get any added survival time from further treatments and often suffer significant side effects.

NEWYORKER: Letting Go

People with heart failure often have a lower quality of life than arthritis, chronic lung disease or angina sufferers.

BBC: Killer heart disease on rise

By studying the climbers, six of whom reached the summit, the researchers hope to gain insight into heart failure, lung disease and sleep apnea all conditions related to a low-oxygen, or hypoxic, state.

WSJ: Mayo Clinic Researchers on Everest Study High Altitude's Effects on the Body