Matthews, CEHebert, JRFreedson, PSStanek, EJMerriam, PAEbbeling, CBOckene, IS2024-04-262024-04-262001-01https://hdl.handle.net/20.500.14394/31492epidemiologic measurements, exercise, reproducibility of results, seasons,Sources of variance in daily physical activity levels in the seasonal variation of Blood Cholesterol Studyarticle