The International Prevalence Study on Physical Activity: results from 20 countries.
Bauman A, Bull F, Chey T, Craig CL, Ainsworth BE, Sallis JF, Bowles HR, Hagstromer M, Sjostrom M, Pratt M; IPS Group.
Bauman A, et al. Among authors: hagstromer m.
Int J Behav Nutr Phys Act. 2009 Mar 31;6:21. doi: 10.1186/1479-5868-6-21.
Int J Behav Nutr Phys Act. 2009.
PMID: 19335883
Free PMC article.