TY  - RPRT
TI  - Measuring physical activity with a single question.
AU  - K B Schechtman
AU  - B Barzilai
AU  - K Rost
AU  - E B Fisher
PY  - 1991
DO  - 10.2105/ajph.81.6.771
UR  - https://pubmed.ncbi.nlm.nih.gov/2029054/
ID  - 2029054
ER  -