@article{doi:10.1001/jama.1989.03430240040020,
author = {Harris SS and Caspersen CJ and DeFriese GH and Estes E and Jr},
title = {COunseling about physical activity-reply},
journal = {JAMA},
volume = {262},
number = {24},
pages = {3407},
year = {1989},
doi = {10.1001/jama.1989.03430240040020},
URL = { + http://dx.doi.org/10.1001/jama.1989.03430240040020},
eprint = {/data/Journals/JAMA/9219/jama_262_24_020.pdf}
}