PT - JOURNAL ARTICLE AU - Lindsey Wahowiak TI - NPHW challenge participants log more than 2.2 billion steps DP - 2017 Jun 01 TA - The Nation's Health PG - 14--14 VI - 47 IP - 4 4099 - http://www.thenationshealth.org/content/47/4/14.short 4100 - http://www.thenationshealth.org/content/47/4/14.full SO - Nations Health2017 Jun 01; 47