Staying on task: challenges of global physical activity surveillance.
Pratt
Michael
M
Division of Nutrition, Physical Activity, and Obesity, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, GA, USA.
Fulton
Janet E
JE
D015444:Exercise; D014943:Global Health; D006293:Health Promotion; D006801:Humans; D011159:Population Surveillance