A comparison of Internet and print-based physical activity interventions.
Marcus BH, Lewis BA, Williams DM, Dunsiger S, Jakicic JM, Whiteley JA, Albrecht AE, Napolitano MA, Bock BC, Tate DF, Sciamanna CN, Parisi AF.
Marcus BH, et al. Among authors: parisi af.
Arch Intern Med. 2007 May 14;167(9):944-9. doi: 10.1001/archinte.167.9.944.
Arch Intern Med. 2007.
PMID: 17502536
Clinical Trial.