Complex sentence: These articles address a variety of diseases and treatments and all measure health effects in terms of the QALYs, a standard measure that accounts for quality of life (morbidity) and longevity (mortality).
Split into simpler sentences: These articles address a variety of diseases and treatments and all measure health effects in terms of quality-adjusted life years (QALYs). The QALY is a standard measure that accounts for quality of life (morbidity) and longevity (mortality).