TY - JOUR T1 - Hundreds of teams in Billion Steps Challenge: APHA’s steps challenge part of National Public Health Week JF - The Nation's Health JO - Nations Health SP - 3 LP - 3 VL - 50 IS - 1 AU - Mark Barna Y1 - 2020/02/01 UR - http://www.thenationshealth.org/content/50/1/3.2.abstract N2 - Hundreds of walking groups have formed for the challenge, which began Jan. 1 and ends April 12, the final day of APHA’s National Public Health Week. ER -